2011 RAM 1500 Owners Manual

WINCH USAGE (POWER WAGON ONLY) — IF EQUIPPED

Things To Know Before Using Your Winch

General Winch Information Your vehicle is equipped with an electric vehicle recovery winch. This winch uses the electrical power from the vehicle charging system to power a motor that winds wire rope into the winch drum via planetary gear reduc- tion. By nature, a winch is capable of generating very high forces and should be used with care. Do not operate the winch without reading and understanding the com- plete winch owner’s manual. Tensioning The Wire Rope The winch rope must be properly tensioned before use. Follow the instructions below to tension the rope: 1. Un-spool the wire rope leaving five wraps of rope on the winch drum.

2. Attach the hook to a suitable anchor point.

CAUTION!

Be certain the anchor will withstand the load re- quired to tension the wire rope.

3. Apply at least 500 lbs (227 kg) of tension to the rope while winding the rope. Always use care to ensure the rope does not pile up on one side of the drum and is neatly wound onto the drum.

CAUTION!

Wire rope must spool on the winch drum in the direction indicated on the drum rotation decal on the winch.

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Low Voltage Interrupt Your winch is equipped with a device that will interrupt winch function if the vehicle charging system voltage drops to a low level. The winch will not power-in or out for 30 seconds if this device is tripped. If the interrupt is tripped, the vehicle should be operated at high idle for a few minutes to allow the vehicle charging system to recover before continuing to winch. Winch Motor Thermal Protection Your winch is equipped with a thermal protection device in the motor. If the winch is operated for an excessive duration, the device may interrupt motor function to protect the winch motor. During this time the winch will power-out but will not power-in. Allow the winch motor to cool for a few minutes before continuing to winch. The winch will resume normal function once the motor cools.

372 STARTING AND OPERATING Understanding The Features Of Your Winch

Winch Components

1. Motor: The winch motor is powered by the vehicle charging system and features a thermal protection switch that automatically stops motor function in the power-in direction if the motor gets too hot. 2. Remote Socket: The remote socket allows the remote control to be attached to the control pack to allow the winch to function. 3. Winch Drum With Integral Brake: The winch drum allows the wire rope to be stored on the winch and transmits force to the wire rope. The winch is equipped with an integral brake that will stop rotation of the winch drum if the winch motor is stopped. 4. 3-Stage Planetary Gear Set: Provides balance between speed and pulling power. 5. Wire Rope: The wire rope allows the winch to be connected to an anchor to provide a pulling force.

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6. Clutch Lever: The clutch lever allows the winch drum to be disconnected from the winch motor to allow the wire rope to be pulled from the winch by hand. 7. Remote Control: The remote control provides the interface between the winch operator and the winch. The remote control provides the ability to power the winch in, out, and stop the winch. To operate the winch, the toggle switch is pressed down to power the winch in and up to power the winch out. The winch will stop if the switch is left in the neutral (center) position.

CAUTION!

If not installed, the hook strap must be placed on the hook.

Fairlead: The fairlead acts as a guide for the wire rope and minimizes damage to the rope.

374 STARTING AND OPERATING Winch Accessories

The following accessories are necessary to attach the winch to anchors, change direction of pull, and for safe winching.

Gloves: Wire rope, through use, will develop ⬙barbs⬙ which can slice skin. It is ex- tremely important to wear protective gloves while oper- ating the winch or handling the wire rope. Avoid loose fit- ting clothes or anything that could become entangled in the wire rope and other mov- ing parts.

Snatch/Block Pulley: Used properly, the multi-purpose snatch block allows you to (1) increase the winch’s pulling power; and (2) change your direction without pulling damaging the wire rope. Proper use of the snatch block is covered in ⬙Before You Pull.⬙

The Clevis/D-Shackles: D-Shackle is a safe means of connecting the looped ends of cables, and snatch blocks. The shackle’s pin is threaded to allow easy re- moval.

straps

Tree Trunk Protector: Typi- cally made of tough, high- quality nylon, it provides the operator an attachment point for the winch rope to a wide variety of anchor points and objects, as well as protect liv- ing trees.

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Operating Your Winch

WARNING!

when spooling wire rope in or out.

Failure to observe any of these warnings regarding proper winch usage may result in severe injury. • Always use supplied hook strap to hold the hook • Never use as a hoist. • Never use to move persons. • Never exceed winch or wire rope rated capacity. • Always wear heavy leather gloves when handling • Never touch wire rope or hook while in tension or • Never engage or disengage clutch if winch is under load, wire rope is in tension, or wire rope drum is moving.

the wire rope.

under load.

(Continued)

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WARNING! (Continued)

others away during winching.

• Always stand clear of wire rope and load and keep • Always keep hands and clothing clear of the wire rope, hook and fairlead opening during operation and when spooling. • Never wrap wire rope back onto itself. Always use a choker chain, wire choker rope or tree trunk protector on the anchor. • Never attach a recovery strap to the winch hook to • Never attempt to tow a vehicle with the recovery • Never use ⴖbungeeⴖ straps that develop tremen- dous and potentially dangerous amounts of force when stretched.

strap attached directly to the winch hook.

increase the length of a pull.

(Continued)

WARNING! (Continued)

use.

of wire rope around the winch drum.

• Always disconnect the remote control when not in • Never winch when there are less than five wraps • Always pass remote control through a window to avoid pinching lead in door, then using remote inside a vehicle. • Never leave the remote control plugged into the winch while free spooling, rigging or sitting idle.

General Information Practice using your winch before you get stuck. Some key points to remember when using your winch are: 1. Always take your time to assess the situation and plan your pull carefully. 2. Always take your time when using a winch. 3. Use the right equipment for the situation. 4. Always wear leather gloves and do not allow the wire rope to slip through your hands when handling the rope. 5. Only the operator should handle the wire rope and remote control. 6. Think safety at all times.

Vehicle Recovery Using The Winch

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CAUTION!

• Always Know Your Winch: Take the time to fully read and understand the included Installation and Operations Guide, and Basic Guide to Winching Techniques, in order to understand your winch and the winching operation. • Always inspect winch installation and wire rope condition before operating the winch. Frayed, kinked or damaged wire rope must be replaced immediately. Loose or damaged winch installation must be corrected immediately. • Always be sure any element which can interfere with safe winching operations is removed prior to initiating winching. • Always keep remote control lead clear of the

drum, wire rope and rigging.

(Continued)

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CAUTION! (Continued)

connections. Replace if damaged.

• Inspect for cracks, pinches, frayed wires, or loose • Be careful not to pull the Winch Cable Collar through the rollers. Watch and listen to Winch for proper snugness.

1. Inspect the winch, winch mount, and wire rope for damage. Do not use the winch if the mount is loose or rope shows excessive wear or damage. 2. Put on gloves. 3. Disengage the clutch to allow free spooling of the winch drum, rotate the clutch lever on the winch to disengage. Freespooling conserves battery power.

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4. Free the winch hook and attach the hook strap. Free the winch hook from its anchor point. Attach the hook strap to the hook (if not attached).

Free Spool

Hook Strap

380 STARTING AND OPERATING 5. Pull the wire to the anchor point. Pull out enough wire rope to reach your anchor point. Be sure to keep a certain amount of tension on the wire as it can become twisted and over-wrapped when slackened, leading to wire rope damage. To prevent losing the end, hold the hook strap while you work.

6. Secure to the anchor point. Once you have established your anchor point, secure the tree-trunk protector or choker-chain around the object.

Tree Trunk Protector

CAUTION!

Always be certain the anchor you select will with- stand the load.

NOTE: How to choose an anchor point: A secure anchor is critical to winching operations. An anchor must be strong enough to hold while winching. Natural an- chors include trees, stumps and rocks. Hook the cable as low as possible. If no natural anchors are available when recovering another vehicle, your vehicle becomes the anchor point. In this case, be sure to put the transmission in NEUTRAL, apply the hand brake and block its wheels to prevent your vehicle from moving. Ideally, you’ll want an anchor point that will enable you to pull straight in the direction the vehicle will move. This allows the wire rope to wind tightly and evenly onto the spooling drum. An anchor point as far away as possible will provide the winch with its greatest pulling power.

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7. Attach the Clevis/D-shackle and Tree Trunk Protector. Attach the shackle to the two ends of the strap or chain and through the hook loop, being careful not to over tighten (tighten and back-off 1/2 turn).

Clevis/D-Shackles

8. Lock the clutch. Lock the winch drum by rotating the clutch lever on the winch to engage.

382 STARTING AND OPERATING NOTE: Always ensure the clutch is fully engaged or disengaged. 9. Connect the remote control to the winch control box, located behind the front bumper. Be careful not to let the remote control cord dangle in front of the winch. If you choose to control the winch from inside your vehicle, always pass the remote through a window to avoid pinching the cord in the door. Always disconnect the remote control when not in use.

10. Put wire rope under tension. Using the remote con- trol switch, slowly wind the wire rope until no slack remains. Once the wire rope is under tension, stand well clear of it and never step over it.

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12. Check wire rope. The wire rope should be neatly wound around the spooling drum. Improper winding can cause damage to the wire rope.

11. Check your anchor. Make sure all connections are secured and free of debris before continuing with the winching procedure.

384 STARTING AND OPERATING 13. In certain situations you may decide to throw a heavy blanket or similar object over the wire rope. A heavy blan- ket can absorb energy should the wire rope break. Place it on the wire rope midway be- tween the winch and the an- chor point. Do this before the wire rope is put under ten- sion. Do not approach or move the blanket once tension is applied. Do not allow it to get pulled into the fairlead. If it is necessary to move or remove the blanket, slack the tension on the wire rope first. 14. Establish ⴖno peopleⴖ zones: Make your intentions clear. Be sure that everyone in the immediate vicinity surrounding the winching operation is completely aware of your intentions before you pull. Declare where the spectators should not stand - never behind or in front of

the vehicle and never near the wire rope or snatch block. Your situation may have other ⴖno peopleⴖ zones.

No People Zones

15. Begin winching. With the winching vehicles engine on and light tension already on the wire rope, begin winching slowly and steadily. Be sure that the wire rope is winding evenly and tightly around the spooling drum.

For additional assistance, the winched vehicle can be slowly driven while being pulled by the winch. Continue pulling until the vehicle is on stable ground. If you are able to drive the vehicle, the winching operation is complete.

Using The Remote Control

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NOTE: • Avoid overheating the winch motor. For extended winching, stop at reasonable intervals to allow the winch motor to cool down. • What to look for under load: The wire rope must always spool onto the drum as indicated by the drum rotation decal on the winch. As you power-in, make sure the wire rope winds evenly and tightly on the drum. This prevents the outer wire wraps from draw- ing into the inner wraps, binding and damaging the wire rope. Avoid shock loads by using the control switch intermittently to take up wire rope slack. Shock loads can momentarily far exceed the winch and wire rope ratings. During side pulls the wire rope tends to stack up at one end of the drum. This stack can become large enough to cause serious damage to the winch. So, line up pulls as straight ahead as possible and stop winching if the wire rope comes close to the tie rods or mounting plate. To fix an uneven stack, spool out that

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section of the rope and reposition it to the opposite end of the drum, which will free up space for continued winching.

16. Secure vehicle. Once recovery of the vehicle’s is complete, be sure to secure the vehicle’s brakes and put the transmission in PARK. Release tension in the wire rope. 17. Disconnect the wire rope, and disconnect from the anchor. 18. Rewind the wire rope. The person handling the wire rope should walk the rope in and not let it slide through the hand, control the winch at all times.

WARNING!

To prevent serious injury, NEVER put your fingers inside the hook area as you are powering-in.

NOTE: How to spool under no load: Arrange the remote control lead so it cannot be caught in the winch.

Arrange the wire rope so it will not kink or tangle when spooled. Be sure any wire rope already on the spooling drum is wound tightly and evenly layered. Tighten and straighten the layer if necessary. Keep the wire rope under light tension and spool the wire rope back and onto the winch drum in even layers. Stop frequently to tighten and straighten the layers as necessary. Repeat this process until the winch hook is the same distance as the full length of the remote control from the winch. Pinch the hook between your thumb and forefinger and attach the hook strap. Hold the hook strap between the thumb and forefinger to keep tension on the wire rope. Walk the wire rope towards the fairlead, carefully spooling in the remaining wire rope. By pulsing the remote control switch. 19. Store the hook on the most outboard loop of the tow hook.

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20. Disconnect the remote control. Disconnect the remote control cord from the control box and store in a clean and dry place. Winching operations are now complete. Put the cap on the solenoid plug-in. NOTE: Always store the remote control in a protected, clean, dry area.

388 STARTING AND OPERATING Rigging Techniques

Various winching situations will require application of other winching techniques. These could range from too little distance to achieve maximum pull using straight line rigging, simply increasing pulling power, or main- taining a straight-line pulling situation. You will have to assess what technique is correct for your situation. Think ⬙safety⬙ at all times.

How To Change The Pulling Direction

Change Pulling Directions

All winching operations should have a straight line from the winch to the object being pulled. This minimizes the wire rope collecting on one side of the drum affecting pulling efficiency and damaging wire rope. A snatch block, secured to a point directly in front of the vehicle

will enable you to change your pulling direction while still allowing the wire rope to be at 90° to wind properly onto the spooling drum. Increasing Pulling Power In some cases, you may find yourself needing more pulling power. The use of snatch blocks increases me- chanical advantage and that increases your pulling power.

Double Line

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Because pulling power decreases with the number of layers of wire rope on the winch drum, you can use a snatch block to double line out more wire rope. This decreases the number of layers of wire rope on the drum, and increases pulling power. Start by feeding out enough wire rope to free the winch hook. Attach the hook to your

390 STARTING AND OPERATING vehicle’s frame/tow hook and run the wire rope through a snatch block. Disengage the clutch and, using the snatch block, pull out enough wire to reach your anchor point. Do not attach the hook to the mounting kit. Secure to the anchor point with a tree trunk protector or choker chain. Attach the clevis/shackle. Attach the shackle to the two ends of the strap/chain, being careful not to over tighten (tighten and back-off 1/2 turn).

POWER STEERING The standard power steering system will give you good vehicle response and increased ease of maneuverability in tight spaces. The system will provide mechanical steering capability if power assist is lost. If for some reason the power assist is interrupted, it will still be possible to steer your vehicle. Under these condi- tions, you will observe a substantial increase in steering effort, especially at very low vehicle speeds and during parking maneuvers.

NOTE: • Increased noise levels at the end of the steering wheel travel are considered normal and do not indicate that there is a problem with the power steering system. • Upon initial start-up in cold weather, the power steer- ing pump may make noise for a short amount of time. This is due to the cold, thick fluid in the steering system. This noise should be considered normal, and it does not in any way damage the steering system.

WARNING!

Continued operation with reduced power steering assist could pose a safety risk to yourself and others. Service should be obtained as soon as possible.

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CAUTION!

CAUTION!

Prolonged operation of the steering system at the end of the steering wheel travel will increase the steering fluid temperature and it should be avoided when possible. Damage to the power steering pump may occur.

Power Steering Fluid Check Checking the power steering fluid level at a defined service interval is not required. The fluid should only be checked if a leak is suspected, abnormal noises are apparent, and/or the system is not functioning as antici- pated. Coordinate inspection efforts through an autho- rized dealer.

Do not use chemical flushes in your power steering system as the chemicals can damage your power steering components. Such damage is not covered by the New Vehicle Limited Warranty.

WARNING!

Fluid level should be checked on a level surface and with the engine off to prevent injury from moving parts and to ensure accurate fluid level reading. Do not overfill. Use only manufacturer’s recommended power steering fluid.

392 STARTING AND OPERATING If necessary, add fluid to restore to the proper indicated level. With a clean cloth, wipe any spilled fluid from all surfaces. Refer to “Fluids, Lubricants, and Genuine Parts” in “Maintaining Your Vehicle” for further information.

MULTI-DISPLACEMENT SYSTEM (MDS) (IF EQUIPPED) — 5.7L ENGINE ONLY This feature offers improved fuel economy by shutting off four of the engine’s eight cylinders during light load and cruise conditions. The system is automatic with no driver inputs or additional driving skills required. NOTE: The MDS system may take some time to return to full functionality after a battery disconnect.

PARKING BRAKE Before leaving the vehicle, make sure that the parking brake is fully applied. Also, be certain to leave the transmission in PARK.

The foot operated parking brake is located below the lower left corner of the instrument panel. To apply the park brake, firmly push the park brake pedal fully. To release the parking brake, pull the parking brake release handle.

Parking Brake Release

When the parking brake is applied with the ignition switch ON, the “Brake Warning Light” in the instrument cluster will illuminate. NOTE: • When the parking brake is applied and the transmis- sion is placed in gear, the “Brake Warning Light” will flash. If vehicle speed is detected, a chime will sound to alert the driver. Fully release the parking brake before attempting to move the vehicle. • This light only shows that the parking brake is ap- plied. It does not show the degree of brake application. When parking on a hill, it is important to turn the front wheels toward the curb on a downhill grade and away from the curb on an uphill grade. Apply the parking brake before placing the shift lever in PARK, otherwise the load on the transmission locking mechanism may

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make it difficult to move the shift lever out of PARK. The parking brake should always be applied whenever the driver is not in the vehicle.

WARNING!

• Never use the PARK position as a substitute for the parking brake. Always apply the parking brake fully when parked to guard against vehicle movement and possible injury or damage. • Never leave children alone in a vehicle. Leaving unattended children in a vehicle is dangerous for a number of reasons. A child or others could be seriously or fatally injured. • Do not leave the key fob in the ignition switch. A child could operate power windows, other con- trols, or move the vehicle.

(Continued)

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WARNING! (Continued)

• Be sure the parking brake is fully disengaged before driving; failure to do so can lead to brake failure and a collision. • Always fully apply the parking brake when leav- ing your vehicle or it may roll and cause damage or injury. Also, be certain to leave the transmission in PARK. Failure to do so may cause the vehicle to roll and cause damage or injury.

CAUTION!

If the Brake System Warning Light remains on with the parking brake released, a brake system malfunc- tion is indicated. Have the brake system serviced by an authorized dealer immediately.

BRAKE SYSTEM If power assist is lost for any reason (for example, repeated brake applications with the engine off), the brakes will still function. However, you will experience a substantial increase in braking effort to stop the vehicle. If either the front or rear hydraulic system loses normal braking capability, the remaining system will still func- tion with some loss of overall braking effectiveness. This will be evident by increased pedal travel during applica- tion, greater pedal force required to slow or stop, and activation of the “Brake Warning Light” and the “ABS Warning Light” (if equipped) during brake use. 3500 Dual Rear Wheel Models Only The brake system power assist is provided by a hydro- boost unit which shares fluid with the power steering system. You may experience some clicking or hissing noises from the hydro-boost system during hard braking conditions.

NOTE: Under cold temperatures, pedal effort will be higher than normal until the power steering fluid reaches operating temperature.

ELECTRONIC BRAKE CONTROL SYSTEM Your vehicle is equipped with an advanced electronic brake control system that includes Anti-Lock Brake Sys- tem (ABS), Traction Control System (TCS), Brake Assist System (BAS), Hill Start Assist (HSA), Electronic Stability Control (ESC) and Trailer Sway Control (TSC). All of the systems work together to enhance vehicle stability and control in various driving conditions, and are commonly referred to as ESC. Anti-Lock Brake System (ABS) The ABS aids the driver in maintaining vehicle control under adverse braking conditions. The system controls hydraulic brake pressure to prevent wheel lockup and help avoid skidding on slippery surfaces during braking.

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NOTE: ABS improves steering control of the vehicle during hard braking maneuvers.

WARNING!

• ABS cannot prevent the natural laws of physics from acting on the vehicle, nor can it increase braking or steering efficiency beyond that af- forded by the condition of the vehicle brakes and tires or the traction afforded.

• The ABS cannot prevent collisions,

including those resulting from excessive speed in turns, following another vehicle too closely, or hydro- planing. • The capabilities of an ABS-equipped vehicle must never be exploited in a reckless or dangerous manner which could jeopardize the user’s safety or the safety of others.

396 STARTING AND OPERATING Traction Control System (TCS) – If Equipped The TCS monitors the amount of wheel spin of each of the driven wheels. If wheel spin is detected, brake pressure is applied to the slipping wheel(s), and engine power is reduced to provide enhanced acceleration and stability. A feature of the TCS functions similarly to a limited-slip differential and controls the wheel spin across a driven axle. If one wheel on a driven axle is spinning faster than the other, the system will apply the brake of the spinning wheel. This will allow more engine torque to be applied to the wheel that is not spinning. This feature remains active even if TCS and ESC are in the “Partial Off” mode. Refer to “Electronic Stability Control (ESC)” in this section of this manual. This brake pressure modulation transfers drive torque from slipping to non-slipping wheels to provide optimal forward traction.

Brake Assist System (BAS) – If Equipped The BAS is designed to optimize the vehicle’s braking capability during emergency braking maneuvers. The BAS detects an emergency braking situation by sensing the rate and amount of brake application and then applies optimum pressure to the brakes. The system applies optimum pressure to the brakes in emergency braking conditions. This can help reduce braking dis- tances. The BAS complements the ABS. Applying the brakes very quickly results in the best BAS assistance. To receive the benefit of BAS, you must apply continuous braking pressure during the stopping sequence. Do not reduce brake pedal pressure unless braking is no longer desired. Once the brake pedal is released, the BAS is deactivated.

WARNING!

• The BAS cannot prevent the natural laws of phys- ics from acting on the vehicle, nor can it increase braking efficiency beyond that afforded by the condition of the vehicle brakes and tires or the traction afforded.

• The BAS cannot prevent collisions,

including those resulting from excessive speed in turns, following another vehicle too closely, or hydro- planing. • The capabilities of a BAS-equipped vehicle must never be exploited in a reckless or dangerous manner which could jeopardize the user’s safety or the safety of others.

Hill Start Assist (HSA) – If Equipped The HSA system is designed to assist the driver in launching a vehicle on an incline. HSA will maintain the

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level of brake pressure the driver inputs for a short duration once the driver takes his foot off of the brake pedal. If the driver does not apply the throttle during this short duration, the system will release brake pressure and the vehicle will roll down the incline. The system will release brake pressure in proportion to the amount of throttle applied. During operation, HSA will activate the brake control system and a clicking noise may occur. If your foot is on the brake pedal during operation you may feel a slight pedal movement. The clicking and pedal movement is normal and both will stop when HSA becomes inactive. HSA Activation Criteria The following criteria must be met in order for HSA to activate: • Vehicle must be stopped • Vehicle must be on a 7% or greater incline

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• Gear selection matches vehicle uphill direction (i.e., vehicle facing uphill is in forward gear; vehicle back- ing uphill is in REVERSE gear).

WARNING!

There may be situations on minor hills (i.e., less than 7%), with a loaded vehicle or while pulling a trailer where the system will not activate and slight rolling may occur, which could cause a collision with an- other vehicle or object. Always remember the driver is responsible for braking the vehicle.

The system will only work if the intended direction of the vehicle and vehicle gear match. For example, if the intended direction is forward up a hill and the vehicle is in DRIVE and the activation criteria are met, HSA will activate.

The system will work in REVERSE and all forward gears, and will not activate if the vehicle is placed in NEUTRAL. Towing And Hauling With HSA The HSA system does not know if your vehicle is loaded or towing a trailer unless the TOW/HAUL switch, lo- cated on the center stack, is selected. When activated, the “TOW/HAUL Indicator Light” will illuminate in the instrument cluster. Refer to “Automatic Transmission” in “Starting and Operating” for further information. In order to accommodate the extra weight entailed under towing and hauling conditions and to increase driver comfort while launching on a hill, the system recognizes when the TOW/HAUL switch is activated and compen- sates by releasing brake pressure at a slower rate while throttle is applied in order to prevent the vehicle from rolling down the hill.

WARNING!

• If you use a trailer brake controller with your trailer, your trailer brakes may be activated and deactivated with the brake switch. If so, when the brake pedal is released, there may not be enough brake pressure to hold the vehicle and trailer on a hill and this could cause a collision with another vehicle or object behind you. In order to avoid rolling down the incline while resuming accelera- tion, manually activate the trailer brake or apply more vehicle brake pressure prior to releasing the brake pedal. Always remember the driver is re- sponsible for braking the vehicle.

(Continued)

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WARNING! (Continued)

• HSA is not a parking brake. If you stop the vehicle on a hill without putting the transmission in PARK or using the parking brake, it will roll down the incline and could cause a collision with an- other vehicle or object. Always remember to use the parking brake while parking on a hill and that the driver is responsible for braking the vehicle.

HSA Off

Non-EVIC Equipped Vehicles If you wish to turn off the HSA system, follow this procedure: 1. Start with the engine OFF, and the vehicle in PARK with the wheels straight. 2. Start the engine.

400 STARTING AND OPERATING 3. With the engine running and the brake applied, rotate the steering wheel 180° counterclockwise from center. 4. Press the “ESC Off” switch four times within 20 sec- onds. The “ESC Off Indicator Light” should appear and disappear four times. 5. Rotate the steering wheel 360° clockwise (180° clock- wise from center). 6. Cycle ignition switch OFF then ON. 7. If the sequence was completed properly, the “ESC Off Indicator Light” will blink several times to confirm HSA is off. Steps 1 through 7 must be completed within 90 seconds to turn off HSA. Repeat steps 1 through 7 to re-enable HSA functionality.

EVIC Equipped Vehicles HSA is a Customer Programmable Feature on a EVIC equipped vehicle. If you wish to turn off the HSA feature, refer to “Electronic Vehicle Information Center (EVIC)/ Customer Programmable Features” in “Understanding Your Instrument Panel” for further information. Electronic Stability Control (ESC) – If Equipped The ESC system enhances directional control and stabil- ity of the vehicle under various driving conditions. ESC corrects for oversteering or understeering of the vehicle by applying the brake of the appropriate wheel to assist in counteracting the oversteer or understeer condition. Engine power may also be reduced to help the vehicle maintain the desired path. ESC uses sensors in the vehicle to determine the vehicle path intended by the driver and compares it to the actual path of the vehicle. When the actual path does not match

the intended path, ESC applies the brake of the appro- priate wheel to assist in counteracting the oversteer or understeer condition. • Oversteer - when the vehicle is turning more than • Understeer - when the vehicle is turning less than

appropriate for the steering wheel position.

appropriate for the steering wheel position.

All Two-Wheel Drive Vehicles And Four-Wheel Drive Vehicles In 2WD, 4WD AUTO, Or 4WD LOCK Modes Can Choose The Following ESC Operating Modes:

ESC On This is the normal operating mode for ESC in 2WD/4WD AUTO/4WD LOCK modes and in 2WD vehicles. When- ever the vehicle is started or the transfer case (if equipped) is shifted from 4WD LOW or Neutral, back to 4WD LOCK or 4WD AUTO, the ESC system will be in

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this mode. This mode should be used for almost all driving situations. ESC should only be turned to “Partial Off” or “ESP Off” for specific reasons as noted below. ESC Partial Off This mode is entered by momentarily pressing the “ESC Off” switch. When in ⬙Partial Off⬙ mode, the TCS portion of ESC, except for the “limited slip” feature described in the TCS section, has been disabled and the ⬙ESC Off Indicator Light⬙ will be illuminated. All other stability features of ESC function normally. This mode is intended to be used if the vehicle is in deep snow, sand, or gravel conditions and more wheel spin than ESC would nor- mally allow is required to gain traction. To turn ESC on again, momentarily press the “ESC Off” switch. This will restore the normal “ESC On” mode of operation. NOTE: To improve the vehicle’s traction when driving with snow chains or starting off in deep snow, sand or gravel, it may be desirable to switch to the “Partial Off”

402 STARTING AND OPERATING mode by pressing the “ESC Off” switch. Once the situa- tion requiring ESC to be switched to the “Partial Off” mode is overcome, turn ESC back on by momentarily pressing the “ESC Off” switch. This may be done while the vehicle is in motion.

WARNING!

In the “Partial Off” mode, the engine torque reduc- tion and stability features are desensitized. There- fore, the enhanced vehicle stability offered by ESC is unavailable.

All Four-Wheel Drive Vehicles In 4WD AUTO And 4WD LOCK Modes Can Also Choose The Following ESC Operating Mode. This Is The Only ESC Operating Mode in 4WD LOW:

Full Off This mode is intended for off-road use when ESC stabil- ity features could inhibit vehicle maneuverability due to trail conditions. This mode is entered by pressing and holding the “ESC Off” switch for five seconds when the vehicle is stopped and the engine is running. After five seconds, the “ESP Off Indicator Light” will illuminate and the “ESC Off” message will appear in the odometer. Press and release the trip odometer button located on the instrument cluster to clear this message. NOTE: The “ESC OFF” message will display and the audible chime will sound when the shift lever is placed

into the PARK position from any other position and then moved out of the PARK position. This will occur even if the message was previously cleared. In this mode, ESC and TCS except for the “limited slip” feature described in the TCS section are turned off until the vehicle reaches a speed of 40 mph (64 km/h). At 40 mph (64 km/h) the system returns to “Partial Off” mode, described above. When the vehicle speed drops below 35 mph (56 km/h) the ESC system shuts off. ESC is off at low vehicle speeds so that it will not interfere with off-road driving but ESC function returns to provide the stability feature at speeds above 40 mph (64 km/h). The “ESC Off Indicator Light” will always be illuminated when ESC is off. To turn ESC on again, momentarily press the “ESC Off” switch. This will restore the normal “ESC On” mode of operation. “ESC Off” is the only operating mode for ESC in 4WD LOW. Whenever the vehicle is started in 4WD LOW or

STARTING AND OPERATING 403
the transfer case (if equipped) is shifted from 4WD LOCK or NEUTRAL, to 4WD LOW, the ESC system will be in this mode.

WARNING!

With the ESC switched off, the enhanced vehicle stability offered by ESC is unavailable. In an emer- gency evasive maneuver the ESC system will not engage to assist in maintaining stability. “ESC Off” mode is intended for off-highway or off-road use only.

ESC Activation/Malfunction Indicator Light And ESC OFF Indicator Light

The “ESC Activation/Malfunction Indicator Light” in the instrument cluster will come on when the ignition switch is turned to the ON position. It should go out with the engine running. If the “ESC Activation/Malfunction Indicator

404 STARTING AND OPERATING Light” comes on continuously with the engine running, a malfunction has been detected in the ESC system. If this light remains on after several ignition cycles, and the vehicle has been driven several miles (kilometers) at speeds greater than 30 mph (48 km/h), see your autho- rized dealer as soon as possible to have the problem diagnosed and corrected. The “ESC Activation/Malfunction Indicator Light” (lo- cated in the instrument cluster) starts to flash as soon as the tires lose traction and the ESC system becomes active. The “ESC Activation/Malfunction Indicator Light” also flashes when TCS is active. If the “ESC Activation/ Malfunction Indicator Light” begins to flash during ac- celeration, ease up on the accelerator and apply as little throttle as possible. Be sure to adapt your speed and driving to the prevailing road conditions.

NOTE: • The “ESC Activation/Malfunction Indicator Light” and the “ESC OFF Indicator Light” come on momen- tarily each time the ignition switch is turned ON. • Each time the ignition is turned ON, the ESC system • The ESC system will make buzzing or clicking sounds when it is active. This is normal; the sounds will stop when ESC becomes inactive following the maneuver that caused the ESC activation.

will be ON even if it was turned off previously.

The “ESC OFF Indicator Light” indicates the Electronic Stability Control (ESC) is off.

STARTING AND OPERATING 405
TSC is only active in the default “ESC On” mode. TSC can be disabled by pressing the “ESC Off” switch and entering “ESC Partial Off” mode. It is not active in the “ESC Partial Off” or “ESC Off” modes. Refer to the ESC portion of this section for an explanation of the different ESC operating modes.

WARNING!

If TSC activates while driving, slow the vehicle down, stop at the nearest safe location, and adjust the trailer load to eliminate trailer sway.

Trailer Sway Control (TSC) – If Equipped The TSC system uses sensors in the vehicle to recognize an excessively swaying trailer and will take the appro- priate actions to attempt to stop the sway. The system may reduce engine power and apply the brake of the appropriate wheel(s) to counteract the sway of the trailer. TSC will become active automatically once an excessively swaying trailer is recognized. No driver action is re- quired. Note that TSC cannot stop all trailers from swaying. Always use caution when towing a trailer and follow the trailer tongue weight recommendations. Refer to “Trailer Towing” in “Starting and Operating” for further information. When TSC is functioning, the “ESP Off Indicator Light” will flash, the engine power may be reduced and you may feel the brakes being applied to individual wheels to attempt to stop the trailer from swaying. TSC is disabled when the ESC system is in the “Partial Off” or “Full Off” modes.

406 STARTING AND OPERATING TIRE SAFETY INFORMATION

Tire Markings

1 — U.S. DOT Safety Stan- dards Code (TIN) 2 — Size Designation 3 — Service Description

4 — Maximum Load

5 — Maximum Pressure 6 — Treadwear, Traction and Temperature Grades

NOTE: • P (Passenger) - Metric tire sizing is based on U.S. design standards. P-Metric tires have the letter “P” molded into the sidewall preceding the size designa- tion. Example: P215/65R15 95H. • European-Metric tire sizing is based on European design standards. Tires designed to this standard have the tire size molded into the sidewall beginning with the section width. The letter ⬙P⬙ is absent from this tire size designation. Example: 215/65R15 96H. • LT (Light Truck) - Metric tire sizing is based on U.S. design standards. The size designation for LT-Metric tires is the same as for P-Metric tires except for the letters “LT” that are molded into the sidewall preced- ing the size designation. Example: LT235/85R16. • Temporary spare tires are high-pressure compact spares designed for temporary emergency use only.

Tires designed to this standard have the letter “T” molded into the sidewall preceding the size designa- tion. Example: T145/80D18 103M.

STARTING AND OPERATING 407

• High flotation tire sizing is based on U.S. design standards and it begins with the tire diameter molded into the sidewall. Example: 31x10.5 R15 LT.

Tire Sizing Chart

Size Designation:

EXAMPLE:

P = Passenger car tire size based on U.S. design standards ⴖ....blank....ⴖ = Passenger car tire based on European design standards LT = Light truck tire based on U.S. design standards T = Temporary spare tire 31 = Overall diameter in inches (in) 215 = Section width in millimeters (mm) 65 = Aspect ratio in percent (%)

— Ratio of section height to section width of tire

10.5 = Section width in inches (in) R = Construction code

— ⬙R⬙ means radial construction —⬙D⬙ means diagonal or bias construction

408 STARTING AND OPERATING

15 = Rim diameter in inches (in)

Service Description:

EXAMPLE:

95 = Load Index

— A numerical code associated with the maximum load a tire can carry

H = Speed Symbol

— A symbol indicating the range of speeds at which a tire can carry a load corresponding to its load index under certain operating conditions — The maximum speed corresponding to the speed symbol should only be achieved under specified operating conditions (i.e., tire pressure, vehicle loading, road conditions, and posted speed limits)

Load Identification:

ⴖ....blank....ⴖ = Absence of any text on the sidewall of the tire indicates a Standard Load (SL) tire Extra Load (XL) = Extra load (or reinforced) tire Light Load = Light load tire C, D, E = Load range associated with the maximum load a tire can carry at a specified pressure

Maximum Load — Maximum load indicates the maximum load this tire is designed to carry Maximum Pressure — Maximum pressure indicates the maximum permissible cold tire inflation pressure for this tire

Tire Identification Number (TIN) The TIN may be found on one or both sides of the tire, however, the date code may only be on one side. Tires with white sidewalls will have the full TIN, including the date code, located on the white sidewall side of the tire.

STARTING AND OPERATING 409
Look for the TIN on the outboard side of black sidewall tires as mounted on the vehicle. If the TIN is not found on the outboard side, then you will find it on the inboard side of the tire.

EXAMPLE:

DOT MA L9 ABCD 0301

DOT = Department of Transportation

— This symbol certifies that the tire is in compliance with the U.S. Department of Transportation tire safety standards and is approved for highway use

MA = Code representing the tire manufacturing location (two digits) L9 = Code representing the tire size (two digits) ABCD = Code used by the tire manufacturer (one to four digits) 03 = Number representing the week in which the tire was manufactured (two digits)

—03 means the 3rd week.

01 = Number representing the year in which the tire was manufactured (two digits)

—01 means the year 2001
— Prior to July 2000, tire manufacturers were only required to have one number to represent the year in which the tire was manufactured. Example: 031 could represent the 3rd week of 1981 or 1991

410 STARTING AND OPERATING Tire Terminology And Definitions

B-Pillar

Term

Cold Tire Pressure

Maximum Inflation Pressure

Recommended Inflation Pressure

Tire Placard

Definition

The vehicle B-Pillar is a structural member of the body located between the front and rear door (of a four-door vehicle) running from the sill to the roof. Cold tire inflation pressure is defined as the tire pressure after the vehicle has not been driven for at least 3 hours, or driven less than 1 mile (1.6 km) after sitting for a three hour period. Inflation pressure is measured in units of PSI (pounds per square inch) or KPa (kilopascals). The maximum inflation pressure is the maximum permissible cold tire inflation pressure for this tire. The max inflation pressure is molded into the sidewall. Vehicle manufacturer’s recommended tire inflation pressure as shown on the tire placard. A paper label permanently attached to the vehicle showing the vehicle’s loading capacity, the original equipment tire size and the recommended inflation pressure.

Tire Loading And Tire Pressure

Tire And Loading Information Placard

STARTING AND OPERATING 411

Tire Placard Location NOTE: The proper cold tire inflation pressure is listed on the driver’s side B-Pillar.

Tire and Loading Information Placard

This placard tells you important information about the: 1) number of people that can be carried in the vehicle 2) total weight your vehicle can carry 3) tire size designed for your vehicle 4) cold tire inflation pressures for the front, rear, and spare tires.

Tire Placard Location

412 STARTING AND OPERATING Loading The vehicle maximum load on the tire must not exceed the load carrying capacity of the tire on your vehicle. You will not exceed the tire’s load carrying capacity if you adhere to the loading conditions, tire size, and cold tire inflation pressures specified on the Tire and Loading Information placard and in the “Vehicle Loading” section of this manual. NOTE: Under a maximum loaded vehicle condition, gross axle weight ratings (GAWRs) for the front and rear axles must not be exceeded. For further information on GAWRs, vehicle loading, and trailer towing, refer to “Vehicle Loading” in this section. To determine the maximum loading conditions of your vehicle, locate the statement “The combined weight of occupants and cargo should never exceed XXX lbs or XXX kg” on the Tire and Loading Information placard.

The combined weight of occupants, cargo/luggage and trailer tongue weight (if applicable) should never exceed the weight referenced here. Steps For Determining Correct Load Limit 1. Locate the statement “The combined weight of occu- pants and cargo should never exceed XXX lbs or XXX kg” on your vehicle’s placard. 2. Determine the combined weight of the driver and passengers that will be riding in your vehicle. 3. Subtract the combined weight of the driver and pas- sengers from XXX lbs or XXX kg. 4. The resulting figure equals the available amount of cargo and luggage load capacity. For example, if “XXX” amount equals 1,400 lbs (635 kg) and there will be five 150 lb (68 kg) passengers in your vehicle, the amount of

available cargo and luggage load capacity is 650 lbs (295 kg) (since 5 x 150 = 750, and 1400 – 750 = 650 lbs [295 kg]). 5. Determine the combined weight of luggage and cargo being loaded on the vehicle. That weight may not safely exceed the available cargo and luggage load capacity calculated in Step 4. 6. If your vehicle will be towing a trailer, load from your trailer will be transferred to your vehicle. Consult this manual to determine how this reduces the available cargo and luggage load capacity of your vehicle.

STARTING AND OPERATING 413

NOTE: • The following table shows examples on how to calcu- late total load, cargo/luggage, and towing capacities of your vehicle with varying seating configurations and number and size of occupants. This table is for illustration purposes only and may not be accurate for the seating and load carry capacity of your vehicle. • For the following example, the combined weight of occupants and cargo should never exceed 865 lbs (392 kg).

414 STARTING AND OPERATING

WARNING!

Safety

STARTING AND OPERATING 415

Overloading of your tires is dangerous. Overloading can cause tire failure, affect vehicle handling, and increase your stopping distance. Use tires of the recommended load capacity for your vehicle. Never overload them.

TIRES — GENERAL INFORMATION

Tire Pressure Proper tire inflation pressure is essential to the safe and satisfactory operation of your vehicle. Three primary areas are affected by improper tire pressure:

WARNING!

cause collisions.

sult in over-heating and tire failure.

• Improperly inflated tires are dangerous and can • Under-inflation increases tire flexing and can re- • Over-inflation reduces a tire’s ability to cushion shock. Objects on the road and chuckholes can cause damage that result in tire failure. • Over-inflated or under-inflated tires can affect vehicle handling and can fail suddenly, resulting in loss of vehicle control. • Unequal tire pressures can cause steering prob-

lems. You could lose control of your vehicle.

(Continued)

416 STARTING AND OPERATING

WARNING! (Continued)

• Unequal tire pressures from one side of the ve- hicle to the other can cause the vehicle to drift to the right or left. • Always drive with each tire inflated to the recom-

mended cold tire inflation pressure.

Economy Improper inflation pressures can cause uneven wear patterns to develop across the tire tread. These abnormal wear patterns will reduce tread life resulting in a need for earlier tire replacement. Under-inflation also increases tire fuel rolling consumption. Ride Comfort And Vehicle Stability Proper tire inflation contributes to a comfortable ride. Over-inflation produces a jarring and uncomfortable ride.

resistance

resulting

higher

in

Tire Inflation Pressures The proper cold tire inflation pressure is listed on the driver’s side “B” Pillar or rear edge of the driver’s side door. Some vehicles may have Supplemental Tire Pressure Information for vehicle loads that are less than the maximum loaded vehicle condition. Refer to “Supple- mental Tire Pressure Information” in “Starting and Op- erating” for further information. The pressure should be checked and adjusted as well as inspecting for signs of tire wear or visible damage at least once a month. Use a good quality pocket-type gauge to check tire pressure. Do not make a visual judgement when determining proper inflation. Radial tires may look properly inflated even when they are under-inflated.

CAUTION!

After inspecting or adjusting the tire pressure, al- ways reinstall the valve stem cap. This will prevent moisture and dirt from entering the valve stem, which could damage the valve stem.

Inflation pressures specified on the placard are always “cold tire inflation pressure.” Cold tire inflation pressure is defined as the tire pressure after the vehicle has not been driven for at least three hours or driven less than 1 mile (1.6 km) after a three hour period. The cold tire inflation pressure must not exceed the maximum infla- tion pressure molded into the tire sidewall. Check tire pressures more often if subject to a wide range of outdoor temperatures as tire pressures vary with temperature changes.

STARTING AND OPERATING 417
Tire pressures change by approximately 1 psi (7 kPa) per 12°F (7°C) of air temperature change. Keep this in mind when checking tire pressure inside a garage, especially in the Winter. Example: If garage temperature = 68°F (20°C) and the outside temperature = 32°F (0°C) then the cold tire inflation pressure should be increased by 3 psi (21 kPa), which equals 1 psi (7 kPa) for every 12°F (7°C) for this outside temperature condition. Tire pressure may increase from 2 to 6 psi (13 to 40 kPa) during operation. Do not reduce this normal pressure build up or your tire pressure will be too low. Tire Pressures For High Speed Operation The manufacturer advocates driving at safe speeds within posted speed limits. Where speed limits or condi- tions are such that the vehicle can be driven at high speeds, maintaining correct tire inflation pressure is very important. Increased tire pressure and reduced vehicle

418 STARTING AND OPERATING loading may be required for high-speed vehicle opera- tion. Refer to original equipment or an authorized tire dealer for recommended safe operating speeds, loading and cold tire inflation pressures.

WARNING!

High speed driving with your vehicle under maxi- mum load is dangerous. The added strain on your tires could cause them to fail. You could have a serious collision. Do not drive a vehicle loaded to the maximum capacity at continuous speeds above 75 mph (120 km/h).

Radial Ply Tires

WARNING!

Combining radial ply tires with other types of tires on your vehicle will cause your vehicle to handle poorly. The instability could cause a collision. Al- ways use radial ply tires in sets of four (or six, in the case of trucks with dual rear wheels). Never combine them with other types of tires.

Cuts and punctures in radial tires are repairable only in the tread area because of sidewall flexing. Consult your authorized tire dealer for radial tire repairs.

Spare Tire Matching Original Equipped Tire And Wheel – If Equipped Your vehicle may be equivalent with a spare tire and wheel in look and function as the original equipment tire and wheel found on the front or rear axle of your vehicle. This spare tire may be used in the tire rotation for your vehicle. If your vehicle has this option refer to an authorized tire dealer for the recommended tire rotation pattern. If your vehicle is not equipped with an original equip- ment tire and wheel as a spare, a non-matching tempo- rary emergency use spare may be equipped with your vehicle. Temporary use spares are engineered to be used only with your vehicle. Your vehicle may be equipped with one of the following types of non-matching tempo- rary use spares; compact, full size, or limited-use. Do not install more than one non-matching temporary use spare tire/wheel on the vehicle at any given time.

STARTING AND OPERATING 419

CAUTION!

Because of the reduced ground clearance, do not take your vehicle through an automatic car wash with a compact, full size or limited-use temporary spare installed. Damage to the vehicle may result.

Compact Spare Tire – If Equipped The compact spare is for temporary emergency use only. You can identify if your vehicle is equipped with a compact spare by looking at the spare tire description on the Tire and Loading Information Placard located on the driver’s side door opening or on the sidewall of the tire. Compact spare tire descriptions begin with the letter “T” or “S” preceding the size designation. Example: T145/ 80D18 103M. T, S = Temporary Spare Tire

420 STARTING AND OPERATING Since this tire has limited tread life the original equip- ment tire should be repaired (or replaced) and reinstalled on your vehicle at the first opportunity. Do not install a wheel cover or attempt to mount a conventional tire on the compact spare wheel, since the wheel is designed specifically for the compact spare tire. Do not install more than one compact spare tire and wheel on the vehicle at any given time

WARNING!

Compact spares are for temporary emergency use only. With these spares, do not drive more than 50 mph (80 km/h). Temporary use spares have limited tread life. When the tread is worn to the tread wear indicators, the temporary use spare tire needs to be replaced. Be sure to follow the warnings, which apply to your spare. Failure to do so could result in spare tire failure and loss of vehicle control.

Full Size Spare – If Equipped The full size spare is for temporary emergency use only. This tire may look like the original equipped tire on the front or rear axle of your vehicle, but it is not. This spare tire may have limited tread life. When the tread is worn to the tread wear indicators, the temporary use full size spare tire needs to be replaced. Since it is not the same as your original equipment tire, replace (or repair) the original equipment tire and reinstall on the vehicle at the first opportunity. Limited-Use Spare – If Equipped The limited-use spare tire is for temporary emergency use only. This tire is identified by a label located on the limited-use spare wheel. This label contains the driving limitations for this spare. This tire may look like the original equipped tire on the front or rear axle of your vehicle, but it is not. Installation of this limited-use spare tire affects vehicle handling. Since it is not the same as

your original equipment tire, replace (or repair) the original equipment tire and reinstall on the vehicle at the first opportunity.

WARNING!

Limited-use spares are for emergency use only. In- stallation of this limited-use spare tire affects vehicle handling. With this tire, do not drive more than the speed listed on the limit-use spare wheel. Keep inflated to the cold tire inflation pressure listed on your Tire and Loading Information Placard located on the driver’s side door opening. Replace (or repair) the original equipment tire at the first opportunity and reinstall it on your vehicle. Failure to do so could result in loss of vehicle control.

STARTING AND OPERATING 421

Tire Spinning When stuck in mud, sand, snow, or ice conditions, do not spin your vehicle’s wheels faster than 30 mph (48 km/h) or for longer than 30 seconds continuously without stopping when you are stuck. Refer to “Freeing A Stuck Vehicle” in “What To Do In Emergencies” for further information.

WARNING!

Fast spinning tires can be dangerous. Forces gener- ated by excessive wheel speeds may cause tire dam- age or failure. A tire could explode and injure some- one. Do not spin your vehicle’s wheels faster than 30 mph (48 km/h) or for more than 30 seconds continuously when you are stuck, and do not let anyone near a spinning wheel, no matter what the speed.

422 STARTING AND OPERATING Tread Wear Indicators Tread wear indicators are in the original equipment tires to help you in determining when your tires should be replaced.

These indicators are molded into the bottom of the tread grooves. They will appear as bands when the tread depth becomes 1/16 in (2 mm). When the tread is worn to the tread wear indicators, the tire should be replaced. Life Of Tire The service life of a tire is dependent upon varying factors including, but not limited to: • Driving style • Tire pressure • Distance driven

1 — Worn Tire 2 — New Tire

WARNING!

Tires and the spare tire should be replaced after six years, regardless of the remaining tread. Failure to follow this warning can result in sudden tire failure. You could lose control and have a collision resulting in serious injury or death.

Keep dismounted tires in a cool, dry place with as little exposure to light as possible. Protect tires from contact with oil, grease, and gasoline. Replacement Tires The tires on your new vehicle provide a balance of many characteristics. They should be inspected regularly for wear and correct cold tire inflation pressure. The manu- facturer strongly recommends that you use tires equiva- lent to the originals in size, quality and performance when replacement is needed. (Refer to the paragraph on “Tread Wear Indicators”). Refer to the “Tire and Loading

STARTING AND OPERATING 423
Information” placard for the size designation of your tire. The Load Index and Speed Symbol for your tire will be found on the original equipment tire sidewall. See the Tire Sizing Chart example found in the Tire Safety Information section of this manual for more information relating to the Load Index and Speed Symbol of a tire. It is recommended to replace the two front tires or two rear tires as a pair. Replacing just one tire can seriously affect your vehicle’s handling. If you ever replace a wheel, make sure that the wheel’s specifications match those of the original wheels. It is recommended you contact your original equipment or an authorized tire dealer with any questions you may have on tire specifications or capability. Failure to use equivalent replacement tires may adversely affect the safety, handling, and ride of your vehicle.

424 STARTING AND OPERATING

WARNING!

• Do not use a tire, wheel size or rating other than that specified for your vehicle. Some combinations of unapproved tires and wheels may change sus- pension dimensions and performance characteris- tics, resulting in changes to steering, handling, and braking of your vehicle. This can cause unpredict- able handling and stress to steering and suspen- sion components. You could lose control and have a collision resulting in serious injury or death. Use only the tire and wheel sizes with load ratings approved for your vehicle. • Never use a tire with a smaller load index or capacity other than what was originally equipped on your vehicle. Using a tire with a smaller load index could result in tire overloading and failure. You could lose control and have a collision.

(Continued)

WARNING! (Continued)

• Failure to equip your vehicle with tires having adequate speed capability can result in sudden tire failure and loss of vehicle control.

CAUTION!

Replacing original tires with tires of a different size may result in false speedometer and odometer read- ings.

SUPPLEMENTAL TIRE PRESSURE INFORMATION — IF EQUIPPED A light load vehicle condition is defined as two passen- gers [150 lbs (68 kg) each] plus 200 lbs (91 kg) of cargo. Cold tire inflation pressures for a lightly loaded vehicle will be found on the face of the driver’s door.

TIRE CHAINS Use “Class S” chains, or other traction aids that meet SAE Type “S” specifications. Use “Class U” chains on 2500/3500 model trucks, or other traction aids that meet SAE Type “U” specifica- tions. NOTE: Chains must be the proper size for the vehicle as recommended by the chain manufacturer.

STARTING AND OPERATING 425

CAUTION!

To avoid damage to your vehicle, tires or chains, observe the following precautions: • Because of limited chain clearance between tires and other suspension components, it is important that only chains in good condition are used. Bro- ken chains can cause serious vehicle damage. Stop the vehicle immediately if noise occurs that could suggest chain breakage. Remove the damaged parts of the chain before further use. • Install chains as tightly as possible and then • Do not exceed 45 mph (72 km/h). • Drive cautiously and avoid severe turns and large

retighten after driving about 0.5 mile (0.8 km).

bumps, especially with a loaded vehicle.

(Continued)

426 STARTING AND OPERATING

CAUTION! (Continued)

ment.

vehicles.

• Do not install tire chains on front wheels of 4x2
• Do not drive for a prolonged period on dry pave- • Observe the tire chain manufacturer’s instructions on method of installation, operating speed, and conditions for usage. Always use the lower sug- gested operating speed of the chain manufacturer if different than the speed recommended by the manufacturer.

These cautions apply to all chain traction devices, includ- ing link and cable (radial) chains. NOTE: • On 4x2 and 4x4 1500 model trucks, the use of class “S” snow chains is permitted on the rear wheels only of trucks equipped with P265/70R17 tires.

• On 4x2 2500 model trucks, the use of class “U” snow chains is permitted on the rear wheels only of trucks equipped with LT245/70R17E or LT265/70R17E tires. • On 4x4 2500 model trucks, the use of class “U” snow chains is permitted on the rear wheels only of trucks equipped with LT245/70R17E, LT265/70R17E, or LT285/70R17D tires. • On 4x2 and 4x4 3500 SRW (Single Rear Wheel) model trucks, the use of class “U” snow chains is permitted on the rear wheels only of trucks equipped with LT265/70R17E tires. • On 4x2 and 4x4 3500 DRW (Dual Rear Wheel) model trucks, the use of class “U” snow chains is permitted on the front and rear wheels of trucks equipped with LT235/80R17E tires.

CAUTION!

Do not use tire chains on the front wheels of any model except for 3500 DRW (Dual Rear Wheel) trucks equipped with LT235/80R17E tires. There may not be adequate clearance for the chains and you are risking structural or body damage to your vehicle. Do not use tire chains on the rear wheels of 1500 model trucks equipped with LT275/70R17, P275/60R20, or 285/45R22 tires. There may not be adequate clearance for the chains and you are risking structural or body damage to your vehicle.

SNOW TIRES Some areas of the country require the use of snow tires during the winter. All season tires can be identified by the M+S designation on the tire sidewall.

STARTING AND OPERATING 427
If you need snow tires, select tires equivalent in size and type to the original equipment tires. Use snow tires only in sets of four; failure to do so may adversely affect the safety and handling of your vehicle. Snow tires generally have lower speed ratings than what was originally equipped with your vehicle and should not be operated at sustained speeds over 75 mph (120 km/h). For speeds above 75 mph (120 km/h) refer to original equipment or an authorized tire dealer for recommended safe operating speeds, loading and cold tire inflation pressures. While studded tires improve performance on ice, skid and traction capability on wet or dry surfaces may be poorer than that of non-studded tires. Some states pro- hibit studded tires; local laws should be checked before using these tire types.

therefore,

428 STARTING AND OPERATING TIRE ROTATION RECOMMENDATIONS Tires on the front and rear axles of vehicles operate at different loads and perform different steering, driving, and braking functions. For these reasons, they wear at unequal rates. These effects can be reduced by timely rotation of tires. The benefits of rotation are especially worthwhile with aggressive tread designs such as those on all season type tires. Rotation will increase tread life, help to maintain mud, snow and wet traction levels and contribute to a smooth, quiet ride. Refer to the “Maintenance Schedule” for the proper maintenance intervals. More frequent rotation is permis- sible if desired. The reasons for any rapid or unusual wear should be corrected prior to rotation being per- formed.

The suggested rotation method is the “forward cross” shown in the following diagram. This rotation pattern does not apply to some directional tires that must not be reversed.

Tire Rotation

Directional Tires – If Equipped For the R/T package with 22” tires & wheels, tire rotation must be performed with consideration of the tire rotation direction. The recommended rotation pattern for direc- tional tires is shown below.

Dual Rear Wheels

STARTING AND OPERATING 429

Tire Rotation

Tire Rotation

The tires used on dual wheel assemblies should be matched for wear to prevent overloading one tire in a set. To check if tires are even, lay a straight edge across all four tires. The straight edge should touch all the tires.

430 STARTING AND OPERATING

CAUTION!

3500 Dual Rear Tires have only one approved direc- tion of rotation. This is to accommodate the asym- metrical design (tread pattern) of the On/Off-Road tire and the use of Outline White Letter (OWL) tires. • When replacing a flat, the spare tire may have to be remounted on the rim, or installed at a different location, to maintain the correct placement of the tire on the wheel relative to the tire/wheel position on the truck. For example, if the spare is used to replace an outer rear tire it will have to be re- mounted on the rim so that the wheel is dished inward. That way the tread design of asymmetrical tires and the white writing of the OWL tires will maintain proper position.

TIRE PRESSURE MONITOR SYSTEM (TPMS) The Tire Pressure Monitor System (TPMS) will warn the driver of a low tire pressure based on the vehicle recom- mended cold placard pressure. The tire pressure will vary with temperature by about 1 psi (6.9 kPa) for every 12°F (6.5°C). This means that when the outside temperature decreases, the tire pressure will decrease. Tire pressure should always be set based on cold inflation tire pressure. This is defined as the tire pressure after the vehicle has not been driven for at least three hours, or driven less than 1 mile (1.6 km) after a three hour period. The cold tire inflation pressure must not exceed the maximum inflation pressure molded into the tire sidewall. Refer to “Tires – General Information” in “Starting and Operating” for information on how to properly inflate the vehicle’s tires. The tire pressure will also increase as the vehicle is driven - this is normal and there should be no adjustment for this increased pres- sure.

The TPMS will warn the driver of a low tire pressure if the tire pressure falls below the low-pressure warning limit for any reason, including low temperature effects and natural pressure loss through the tire. The TPMS will continue to warn the driver of low tire pressure as long as the condition exists, and will not turn off until the tire pressure is at or above the recommended cold placard pressure. Once the low tire pressure warn- ing (Tire Pressure Monitoring [TPM] Telltale Light) illu- minates, you must increase the tire pressure to the recommended cold placard pressure in order for the TPM Telltale Light to turn off. The system will automatically update and the TPM Telltale Light will turn off once the system receives the updated tire pressures. The vehicle may need to be driven for up to 20 minutes above 15 mph (24 km/h) in order for the TPMS to receive this informa- tion.

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For example, your vehicle may have a recommended cold (parked for more than three hours) placard pressure of 30 psi (207 kPa). If the ambient temperature is 68°F (20°C) and the measured tire pressure is 27 psi (186 kPa), a temperature drop to 20°F (-7°C) will decrease the tire pressure to approximately 23 psi (158 kPa). This tire pressure is sufficiently low enough to turn ON the TPM Telltale Light. Driving the vehicle may cause the tire pressure to rise to approximately 27 psi (186 kPa), but the TPM Telltale Light will still be ON. In this situation, the TPM Telltale Light will turn OFF only after the tires are inflated to the vehicle’s recommended cold placard pres- sure value.

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CAUTION!

• The TPMS has been optimized for the original equipment tires and wheels. TPMS pressures and warning have been established for the tire size equipped on your vehicle. Undesirable system operation or sensor damage may result when us- ing replacement equipment that is not of the same size, type, and/or style. Aftermarket wheels can cause sensor damage. Do not use aftermarket tire sealants or balance beads if your vehicle is equipped with a TPMS, as damage to the sensors may result. • After inspecting or adjusting the tire pressure, always reinstall the valve stem cap. This will prevent moisture and dirt from entering the valve stem, which could damage the TPM sensor.

while adjusting your tire pressure.

NOTE: • The TPMS is not intended to replace normal tire care and maintenance or to provide warning of a tire failure or condition. • The TPMS should not be used as a tire pressure gauge • Driving on a significantly under-inflated tire causes the tire to overheat and can lead to tire failure. Under-inflation also reduces fuel efficiency and tire tread life, and may affect the vehicle’s handling and stopping ability. • The TPMS is not a substitute for proper tire mainte- nance, and it is the driver’s responsibility to maintain correct tire pressure using an accurate tire pressure gauge, even if under-inflation has not reached the level to trigger illumination of the TPM Telltale Light.

• Seasonal temperature changes will affect tire pressure, and the TPMS will monitor the actual tire pressure in the tire.

Base System The Tire Pressure Monitor System (TPMS) uses wireless technology with wheel rim mounted electronic sensors to monitor tire pressure levels. Sensors mounted to each wheel as part of the valve stem transmit tire pressure readings to the receiver module. It is particularly important for you to check the NOTE: tire pressure in all of the tires on your vehicle monthly and to maintain the proper pressure. The TPMS consists of the following components: • Receiver module, • Four TPM sensors, and • TPM Telltale Light

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The matching full size spare wheel and tire assembly (if equipped) has a TPM sensor. The matching full size spare can be used in place of any of the four road tires. The TPMS will only monitor the pressure in the full size spare when it is used in place of a road tire. Otherwise, a spare with a pressure below the low-pressure limit will not cause the TPM Telltale Light to illuminate or the chime to sound. Tire Pressure Monitoring Low Pressure Warnings

The TPM Telltale Light will illuminate in the instrument cluster and a chime will sound when tire pressure is low in one or more of the four active road tires. Should this occur, you should stop as soon as possible, check the inflation pressure of each tire on your vehicle, and inflate each tire to the vehicle’s recommended cold placard pressure value. Once the system receives the updated tire pressures, the system will automatically update and the TPM Telltale Light will

434 STARTING AND OPERATING turn off. The vehicle may need to be driven for up to 20 minutes above 15 mph (24 km/h) in order for the TPMS to receive this information. Check TPMS Warning If a system fault is detected, the TPM Telltale Light will flash on and off for 75 seconds and then remain on solid. The system fault will also sound a chime. If the ignition switch is cycled, this sequence will repeat, providing the system fault still exists. The TPM Telltale Light will turn off when the fault condition no longer exists. A system fault can occur due to any of the following: 1. Signal interference due to electronic devices or driving next to facilities emitting the same radio frequencies as the TPM sensors. 2. Installing aftermarket window tinting that contains materials that may block radio wave signals.

3. Accumulation of snow or ice around the wheels or wheel housings. 4. Using tire chains on the vehicle. 5. Using wheels/tires not equipped with TPM sensors. Vehicles With Full Size Spare 1. The matching full size spare wheel and tire assembly has a TPM sensor that can be monitored by the TPMS. 2. If you install the full size spare in place of a road tire that has a pressure below the low-pressure warning limit, upon the next ignition switch cycle, a chime will sound and the TPM Telltale Light will turn ON. 3. Driving the vehicle for up to 20 minutes above 15 mph (24 km/h) will turn off the TPM Telltale Light, as long as no tire pressure is below the low-pressure warning limit in any of the four active road tires.

Premium System – If Equipped The Tire Pressure Monitor System (TPMS) uses wireless technology with wheel rim mounted electronic sensors to monitor tire pressure levels. Sensors mounted to each wheel as part of the valve stem transmit tire pressure readings to the receiver module. It is particularly important for you to check the NOTE: tire pressure in all of the tires on your vehicle monthly and to maintain the proper pressure.

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tronic Vehicle Information Center (EVIC), and

The TPMS consists of the following components: • Receiver module, • Four TPM sensors, • Various TPMS messages, which display in the Elec- • TPM Telltale Light The matching full size spare wheel and tire assembly (if equipped) has a TPM sensor. The full size spare can be used in place of any of the four road tires. A spare with a pressure below the low-pressure limit will not cause the TPM Telltale Light to illuminate or the chime to sound.

436 STARTING AND OPERATING Tire Pressure Monitoring Low Pressure Warnings

The TPM Telltale Light will illuminate in the instrument cluster and a chime will sound when tire pressure is low in one or more of the four active road tires. In addition, the EVIC will display one or more low pressure messages (Left Front, Left Rear, Right Front, Right Rear) for three seconds and a graphic showing the pressure values of each tire with the low tire pressure values flashing.

Should this occur, you should stop as soon as possible and inflate the tires with a low pressure condition (those flashing in the EVIC graphic) to the vehicle’s recom- mended cold placard pressure inflation value. Once the system receives the updated tire pressures, the system will automatically update, the graphic display in the EVIC will stop flashing, and the TPM Telltale Light will

turn off. The vehicle may need to be driven for up to 20 minutes above 15 mph (24 km/h) in order for the TPMS to receive this information. Check TPMS Warning If a system fault is detected, the TPM Telltale Light will flash on and off for 75 seconds and then remain on solid. The system fault will also sound a chime. In addition, the EVIC will display a ⬙CHECK TPM SYSTEM⬙ message for three seconds and then display dashes (- -) in place of the pressure value to indicate which sensor is not being received.

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438 STARTING AND OPERATING If the ignition switch is cycled, this sequence will repeat, providing the system fault still exists. If the system fault no longer exists, the TPM Telltale Light will no longer flash, and the ⬙CHECK TPM SYSTEM⬙ message will no longer display, and a pressure value will display in place of the dashes. A system fault can occur due to any of the following: 1. Signal interference due to electronic devices or driving next to facilities emitting the same radio frequencies as the TPM sensors. 2. Installing aftermarket window tinting that contains materials that may block radio wave signals. 3. Accumulation of snow or ice around the wheels or wheel housings. 4. Using tire chains on the vehicle. 5. Using wheels/tires not equipped with TPM sensors.

Vehicles With Full Size Spare 1. The matching full size spare wheel and tire assembly has a TPM sensor that can be monitored by the TPMS. 2. If you install the full size spare in place of a road tire that has a pressure below the low-pressure warning limit, upon the next ignition switch cycle, a chime will sound and the TPM Telltale Light will turn ON. In addition, the EVIC will display a low pressure message and a graphic showing the low tire pressure value flashing. 3. After driving the vehicle for up to 20 minutes above 15 mph (24 km/h) the TPM Telltale Light will turn OFF, as long as no tire pressure is below the low-pressure warning limit in any of the four active road tires.

Tire Pressure Monitor System (TPMS) Tire Light Load Inflation Switch Description (2500 Models) – If Equipped

WARNING!

Never operate your vehicle with the TPMS and tire pressures set to the Light Load Inflation Pressure settings if carrying more than two occupants (150 lbs [68 kg] each) plus 200 lbs (91 kg) of cargo. The vehicle “Light Load Definition” is found in the Supplemen- tal Tire Pressure Information Label which is located on the rear face of the driver door opening. Failure to do so may cause you to lose control resulting in a collision, causing serious or fatal injury.

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The TPMS tire light load inflation switch will allow the driver to switch between the max load inflation pressure (cold) low pressure warning threshold and the light load inflation pressure (cold) low pressure warning threshold depending on the vehicle’s load condition. The Tire and Loading Information label defines the recommended front and rear cold tire inflation pressures for the vehicle when operating in the Max Load condition. A Supple- mental Tire Pressure Information label is also available defining Light Load tire inflation pressures when oper- ating in the Light Load condition. When the tire light

440 STARTING AND OPERATING load inflation switch LED is ON, the TPMS is using the light load inflation pressure (cold) low inflation warning thresholds.

Tire Light Load Inflation Switch

Tire Light Load Inflation Switch Operation – If Equipped • This vehicle may have different recommended tire pressure values between the front and rear tires as shown in both the Tire Loading Information Label and the Supplemental Tire Pressure Information Label. It is also equipped to be driven with tire pressures appro- priate to either a Light Load condition or the vehicle Max Load condition. • The tire light load inflation switch will allow the driver to change between the max load inflation pressure (cold) low pressure warning threshold and the light load inflation pressure (cold) low pressure warning threshold depending on the vehicle’s load condition. Refer to the “Supplemental Tire Pressure Information” label for the vehicle’s Light Load inflation pressures and “Tire and Loading Information” label for the vehicle’s Max Load inflation pressures.

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Tire Pressure Information label. The Supplemental Tire Pressure Information label is located on the rear face of the driver door opening. Use an accurate tire gauge to check the tire pressures when lowering all four tire pressures. The vehicle may need to be driven above 15 mph (24 km/h) to receive this updated pressure information. After all four tire pressures have been lowered to the Light Load inflation pressures, press the tire light load inflation switch. If the tire light load inflation switch’s amber colored LED turns ON, the TPMS is using the light load inflation pressure (cold) low pressure warning thresholds. If the tire light load inflation switch amber colored LED flashes on and off for 10 seconds, after all four tire pressures have been lowered to the Light Load inflation pressures, the pressure in any one of the four tires may not be at the light load inflation pressure (cold) values as indicated for the Light Load condition as defined on the Supplemental Tire Pressure Information label located on

Example Supplemental Tire Pressure Label

To switch from the max load inflation pressure (cold) low pressure warning threshold to the light load inflation pressure (cold) low pressure warning threshold, begin by placing the ignition switch in the RUN position. Next, lower all four road tire pressures to the Light Load Inflation Pressure values as listed on the Supplemental

442 STARTING AND OPERATING the rear face of the driver door. Using an accurate tire pressure gauge, re-check the tire pressures for the light load inflation pressure (cold) value.

WARNING!

It is the driver’s responsibility to change to the max load inflation pressure (cold) low pressure warning threshold condition when not driving in the light load condition as defined as two occupants (150 lbs [68 kg] each) plus 200 lbs (91 kg) of cargo. The vehicle “Light Load Definition” is found in the Supplemen- tal Tire Pressure Information label located on the rear face of the driver door. Failure to do so may cause you to lose control resulting in a collision, causing seri- ous or fatal injury.

To switch back to the max load inflation pressure (cold) low pressure warning threshold, press the tire light load inflation switch. It is not necessary to first fill the tires to

the max load inflation pressure (cold) values to switch the TPMS system to the max load inflation pressure (cold) low pressure warning threshold. If after pressing the tire light load inflation switch, and tire pressures are below the max load inflation pressure (cold) low pressure warning thresholds, the TPMS low pressure warning telltale light (located in the instrument cluster) will turn ON and a chime will sound. The tire pressures are now required to be inflated to the max load inflation pressure (cold) values described on the Tire and Loading Informa- tion label. The Tire and Loading Information label is located on the drivers side B-pillar. If the tire light load inflation switch LED turns OFF, the TPMS has been reset and the TPMS is using the max load inflation pressure (cold) low pressure warning thresholds. General Information This device complies with Part 15 of the FCC rules and RSS 210 of Industry Canada. Operation is subject to the following conditions:

• This device may not cause harmful interference. • This device must accept any interference received, including interference that may cause undesired operation.

The TPM sensors are regulated under one of the follow- ing licenses:

United States . . . . . . . . . . . . . . . . . . . . . KR5S120123
Canada . . . . . . . . . . . . . . . . . . . . . . . . 2671-S120123

FUEL REQUIREMENTS

3.7L and 4.7L Engine

These engines are designed to meet all emissions regulations and provide excel- lent fuel economy and performance when using high quality unleaded “regular” gasoline having an octane rating of 87. The

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use of premium gasoline is not recommended, as it will not provide any benefit over regular gasoline in these engines. 5.7L Engine

This engine is designed to meet all emis- sions regulations and provide satisfactory fuel economy and performance when us- ing high quality unleaded gasoline having an octane range of 87 to 89. The manufac- turer recommends the use of 89 octane for optimum performance. The use of premium gasoline is not recommended, as it will not provide any benefit over regular gasoline in these engines. Light spark knock at low engine speeds is not harmful to your engine. However, continued heavy spark knock at high speeds can cause damage and immediate service is required. Poor quality gasoline can cause problems such

444 STARTING AND OPERATING as hard starting, stalling, and hesitations. If you experi- ence these symptoms, try another brand of gasoline before considering service for the vehicle. Over 40 auto manufacturers worldwide have issued and endorsed consistent gasoline specifications (the World- wide Fuel Charter, WWFC) which define fuel properties necessary to deliver enhanced emissions, performance, and durability for your vehicle. The manufacturer recom- mends the use of gasoline that meets the WWFC speci- fications if they are available. Reformulated Gasoline Many areas of the country require the use of cleaner burning gasoline referred to as “Reformulated Gasoline.” Reformulated gasolines contain oxygenates and are spe- cifically blended to reduce vehicle emissions and im- prove air quality.

The manufacturer supports the use of reformulated gaso- lines. Properly blended reformulated gasolines will pro- vide excellent performance and durability for the engine and fuel system components. Gasoline/Oxygenate Blends Some fuel suppliers blend unleaded gasoline with oxy- genates such as Ethanol. Fuels blended with oxygenates may be used in your vehicle.

CAUTION!

DO NOT use gasoline containing Methanol or gaso- line containing more than 10% Ethanol. Use of these blends may result in starting and driveability prob- lems, damage critical fuel system components, cause emissions to exceed the applicable standard, and/or cause the “Malfunction Indicator Light” to illumi- nate. Pump labels should clearly communicate if a fuel contains greater than 10% Ethanol.

Problems that result from using gasoline containing Methanol or gasoline containing more than 10% Ethanol are not the responsibility of the manufacturer and may not be covered under warranty. E-85 Usage In Non-Flex Fuel Vehicles Non-FFV vehicles are compatible with gasoline contain- ing 10% ethanol (E10). Gasoline with higher ethanol content may void the vehicle’s warranty. If a Non-FFV vehicle is inadvertently fueled with E-85
fuel, the engine will have some or all of these symptoms: • operate in a lean mode • OBD II “Malfunction Indicator Light” on • poor engine performance • poor cold start and cold drivability • increased risk for fuel system component corrosion

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To fix a Non-FFV vehicle inadvertently fueled once with E-85 perform the following: • drain the fuel tank (see your authorized dealer) • change the engine oil and oil filter • disconnect and reconnect the battery to reset the

engine controller memory

More extensive repairs will be required for prolonged exposure to E-85 fuel. MMT In Gasoline MMT is a manganese containing metallic additive that is blended into some gasoline to increase octane. Gasoline blended with MMT provides no performance advantage beyond gasoline of the same octane number without MMT. Gasoline blended with MMT reduces spark plug life and reduces emissions system performance in some vehicles. The manufacturer recommends that gasoline without MMT be used in your vehicle. The MMT content

446 STARTING AND OPERATING of gasoline may not be indicated on the gasoline pump, therefore, you should ask your gasoline retailer whether or not his/her gasoline contains MMT. It is even more important to look for gasolines without MMT in Canada, because MMT can be used at levels higher than those allowed in the United States. MMT is prohibited in Federal and California reformulated gasoline. Materials Added To Fuel All gasoline sold in the United States is required to contain effective detergent additives. Use of additional detergents or other additives is not needed under normal conditions and would result in unnecessary cost. There- fore, you should not have to add anything to the fuel.

Fuel System Cautions

CAUTION!

Follow these guidelines to maintain your vehicle’s performance: • The use of leaded gas is prohibited by Federal law. Using leaded gasoline can impair engine perfor- mance and damage the emission control system.