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content. Do not use the fuel if the ethanol content is greater than 85%.
Driving and Operating
9-71
{ Caution
Do not use fuel containing methanol. It can corrode metal parts in the fuel system and also damage plastic and rubber parts. That damage would not be covered under the vehicle warranty.
Filling the Tank
{ Warning
Fuel vapors and fuel fires burn violently and can cause injury or death.
. To help avoid injuries to you and others, read and follow all the instructions on the fuel pump island.
. Turn off the engine when
refueling.
(Continued)
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9-72
Driving and Operating
Warning (Continued)
. Keep sparks, flames, and
smoking materials away from fuel.
. Do not leave the fuel pump
unattended.
. Do not reenter the vehicle
while pumping fuel.
. Keep children away from the
fuel pump and never let children pump fuel.
. Fuel can spray out if the fuel
cap is opened too quickly. This spray can happen if the tank is nearly full, and is more likely in hot weather. Open the fuel cap slowly and wait for any hiss noise to stop then unscrew the cap all the way.
The fuel cap is behind a hinged fuel door on the driver side of the vehicle. If the vehicle has E85 fuel
capability, the fuel cap will be yellow and state that E85 or gasoline can be used. See E85 or FlexFuel on page 9-71.
To open the fuel door, push and release the rearward center edge of the door. To remove the fuel cap, turn it slowly counterclockwise. The fuel cap has a spring in it; if the cap is released too soon, it will spring back to the right.
While refueling, hang the tethered fuel cap from the hook on the fuel door. Be careful not to spill fuel. Do not top off or overfill the tank and wait a few seconds after you have finished pumping before removing the nozzle. Clean fuel from painted surfaces as soon as possible. See Exterior Care on page 10-88. When replacing the fuel cap, insert the tether in its hole before tightening the cap. Turn the fuel cap clockwise until it clicks. It will require more effort to turn the fuel cap on the last turn as you tighten it. Make sure the cap is fully installed. The diagnostic system can determine if the fuel cap has been left off or improperly installed. This would allow fuel to evaporate into the atmosphere. See Malfunction Indicator Lamp on page 5-22. The TIGHTEN GAS CAP message displays if the fuel cap is not properly installed.
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{ Warning
If a fire starts while you are refueling, do not remove the nozzle. Shut off the flow of fuel by shutting off the pump or by notifying the station attendant. Leave the area immediately.
{ Caution
If a new fuel cap is needed, be sure to get the right type of cap from your dealer. The wrong type of fuel cap may not fit properly, may cause the malfunction indicator lamp to light, and could damage the fuel tank and emissions system. See Malfunction Indicator Lamp on page 5-22.
Filling a Portable Fuel Container
{ Warning
Filling a portable fuel container while it is in the vehicle can cause fuel vapors that can ignite either by static electricity or other means. You or others could be badly burned and the vehicle could be damaged. Always:
. Use approved fuel
containers.
. Remove the container from the vehicle, trunk, or pickup bed before filling.
. Place the container on the
ground.
(Continued)
Driving and Operating
9-73
Warning (Continued)
. Place the nozzle inside the fill
opening of the container before dispensing fuel, and keep it in contact with the fill opening until filling is complete.
. Fill the container no more than 95% full to allow for expansion.
. Do not smoke, light matches,
or use lighters while pumping fuel.
. Avoid using cell phones or
other electronic devices.
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Driving and Operating
Trailer Towing
General Towing Information Only use towing equipment that has been designed for the vehicle. Contact your dealer or trailering dealer for assistance with preparing the vehicle for towing a trailer. Read the entire section before towing a trailer. For towing a disabled vehicle, see Towing the Vehicle on page 10-83. For towing the vehicle behind another vehicle such as a motor home, see Recreational Vehicle Towing on page 10-83.
Driving Characteristics and Towing Tips
Driving with a Trailer When towing a trailer: . Become familiar with the state
and local laws that apply to trailer towing.
. Do not tow a trailer during the first 800 km (500 mi) to prevent damage to the engine, axle, or other parts. Then during the first 800 km (500 mi) of trailer towing, do not drive over 80 km/h (50 mph) and do not make starts at full throttle.
. Vehicles can tow in D (Drive).
Shift the transmission to a lower gear if the transmission shifts too often under heavy loads and/ or hilly conditions.
. Do not use Adaptive Cruise
Control when towing. Turn off Park Assist when towing. The Automatic Collision Preparation System should be set to Off when towing. See Active Emergency Braking System on page 9-63.
{ Warning
When towing a trailer, exhaust gases may collect at the rear of the vehicle and enter if the liftgate, trunk/hatch, or rear-most window is open. When towing a trailer:
. Do not drive with the liftgate,
trunk/hatch, or rear-most window open.
. Fully open the air outlets on
or under the instrument panel.
. Also adjust the climate
control system to a setting that brings in only outside air. See “Climate Control Systems” in the Index. For more information about Carbon Monoxide, see Engine Exhaust on page 9-30.
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Towing a trailer requires a certain amount of experience. The combination you are driving is longer and not as responsive as the vehicle itself. Get acquainted with the handling and braking of the rig before setting out for the open road. Before starting, check all trailer hitch parts and attachments, safety chains, electrical connectors, lamps, tires, and mirrors. If the trailer has electric brakes, start the combination moving and then apply the trailer brake controller by hand to be sure the brakes work. During the trip, check occasionally to be sure that the load is secure and the lamps and any trailer brakes still work. Following Distance Stay at least twice as far behind the vehicle ahead as you would when driving the vehicle without a trailer. This can help to avoid heavy braking and sudden turns.
Passing More passing distance is needed when towing a trailer. The combination will not accelerate as quickly and is longer so it is necessary to go much farther beyond the passed vehicle before returning to the lane. Backing Up Hold the bottom of the steering wheel with one hand. To move the trailer to the left, move that hand to the left. To move the trailer to the right, move your hand to the right. Always back up slowly and, if possible, have someone guide you. Making Turns
{ Caution
Making very sharp turns while trailering could cause the trailer to come in contact with the vehicle.
(Continued)
Driving and Operating
9-75
Caution (Continued)
The vehicle could be damaged. Avoid making very sharp turns while trailering.
When turning with a trailer, make wider turns than normal. Do this so the trailer will not strike soft shoulders, curbs, road signs, trees, or other objects. Avoid jerky or sudden maneuvers. Signal well in advance. If the trailer turn signal bulbs burn out, the arrows on the instrument cluster will still flash for turns. It is important to check occasionally to be sure the trailer bulbs are still working. Driving on Grades Reduce speed and shift to a lower gear before starting down a long or steep downgrade. If the transmission is not shifted down, the brakes might get hot and no longer work well.
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Driving and Operating
Vehicles can tow in D (Drive). Shift the transmission to a lower gear if the transmission shifts too often under heavy loads and/or hilly conditions. When towing, use the Tow/Haul Mode to prevent damage to the engine or transmission. See Tow/ Haul Mode on page 9-36. When towing at high altitude on steep uphill grades, consider the following: Engine coolant will boil at a lower temperature than at normal altitudes. If the engine is turned off immediately after towing at high altitude on steep uphill grades, the vehicle may show signs similar to engine overheating. To avoid this, let the engine run while parked, preferably on level ground, with the transmission in P (Park) for a few minutes before turning the engine off. If the overheat warning comes on, see Engine Overheating on page 10-19.
Parking on Hills
{ Warning
Parking the vehicle on a hill with the trailer attached can be dangerous. If something goes wrong, the rig could start to move. People can be injured, and both the vehicle and the trailer can be damaged. When possible, always park the rig on a flat surface.
If parking the rig on a hill: 1. Press the brake pedal, but do not shift into P (Park) yet. Turn the wheels into the curb if facing downhill or into traffic if facing uphill.
2. Have someone place chocks
under the trailer wheels.
3. When the wheel chocks are in
place, release the regular brakes until the chocks absorb the load.
4. Reapply the brake pedal. Then
apply the parking brake and shift into P (Park).
5. Release the brake pedal. Leaving After Parking on a Hill 1. Apply and hold the brake pedal. 2. Start the engine. 3. Shift into a gear. 4. Release the parking brake. 5. Let up on the brake pedal. 6. Drive slowly until the trailer is
clear of the chocks.
7. Stop and have someone pick up
and store the chocks.
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Maintenance when Trailer Towing The vehicle needs service more often when pulling a trailer. See Maintenance Schedule on page 11-3. Things that are especially important in trailer operation are automatic transmission fluid, engine oil, axle lubricant, belts, cooling system, and brake system. It is a good idea to inspect these before and during the trip. Check periodically to see that all hitch nuts and bolts are tight.
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Trailer Towing Do not tow a trailer during break-in. See New Vehicle Break-In on page 9-19.
{ Warning
The driver can lose control when pulling a trailer if the correct equipment is not used or the vehicle is not driven properly. For example, if the trailer is too heavy, the brakes may not work well — or even at all. The driver and passengers could be seriously injured. The vehicle may also be damaged; the resulting repairs would not be covered by the vehicle warranty. Pull a trailer only if all the steps in this section have been followed. Ask your dealer for advice and information about towing a trailer with the vehicle.
{ Caution
Pulling a trailer improperly can damage the vehicle and result in costly repairs not covered by the vehicle warranty. To pull a trailer correctly, follow the advice in this section and see your dealer for important information about towing a trailer with the vehicle.
To identify the trailering capacity of the vehicle, read the information in “Weight of the Trailer” following. Trailering is different than just driving the vehicle by itself. Trailering means changes in handling, acceleration, braking, durability, and fuel economy. Successful, safe trailering takes correct equipment, and it has to be used properly.
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Driving and Operating
Trailer Weight Rating (TWR) is calculated assuming the tow vehicle has only the driver and all required trailering equipment. Weight of additional optional equipment, passengers, and cargo in the tow vehicle must be subtracted from the trailer weight rating. Use the following chart to determine how much the vehicle can weigh, based upon the vehicle model and options.
The following information has many time-tested, important trailering tips and safety rules. Many of these are important for your safety and that of your passengers. So please read this section carefully before pulling a trailer. Weight of the Trailer How heavy can a trailer safely be? It depends on how the rig is used. Speed, altitude, road grades, outside temperature, and how much the vehicle is used to pull a trailer are all important. It can depend on any special equipment on the vehicle, and the amount of tongue weight the vehicle can carry. See “Weight of the Trailer Tongue” later in this section.
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Vehicle 1500 Series 2WD Short Wheelbase
5.3L V8
5.3L V81500 Series 2WD Long Wheelbase
5.3L V8
5.3L V81500 Series 4WD Short Wheelbase
5.3L V8
5.3L V81500 Series 4WD Long Wheelbase
5.3L V8
5.3L V8Driving and Operating
9-79
Axle Ratio
Maximum Trailer Weight
GCWR*
3.08
3.423.08
3.423.08
3.423.08
3.422 994 kg (6,600 lb) 3 901kg (8,600 lb)
5 443 kg (12,000 lb) 6 350 kg (14,000 lb)
2 858 kg (6,300 lb) 3 765 kg (8,300 lb)
5 443 kg (12,000 lb) 6 350 kg (14,000 lb)
2 903 kg (6,400 lb) 3 810 kg (8,400 lb)
5 443 kg (12,000 lb) 6 350 kg (14,000 lb)
2 722 kg (6,000 lb) 3 629 kg (8,000 lb)
5 443 kg (12,000 lb) 6 350 kg (14,000 lb)
*The Gross Combination Weight Rating (GCWR) is the total allowable weight of the completely loaded vehicle and trailer including any passengers, cargo, equipment, and conversions. The GCWR for the vehicle should not be exceeded.
Ask your dealer for trailering information or advice.
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9-80
Driving and Operating
Weight of the Trailer Tongue The tongue load (1) of any trailer is very important because it is also part of the vehicle weight. The Gross Vehicle Weight (GVW) includes the curb weight of the vehicle, any cargo carried in it, and the people who will be riding in the vehicle as well as trailer tongue weight. Vehicle options, equipment, passengers, and cargo in the vehicle reduce the amount of tongue weight the vehicle can carry, which will also reduce the trailer weight the vehicle can tow. See Vehicle Load Limits on page 9-14
for more information about the vehicle's maximum load capacity.Trailer tongue weight (1) should be 10 % to 15 % of the loaded trailer weight (2) up to the maximums for vehicle series and hitch type.
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Driving and Operating
9-81
Vehicle Series
Hitch Type
1500
1500Weight Carrying
Weight Distributing
Maximum Tongue
Weight
272 kg (600 lb) 453 kg (1,000 lb)
Do not exceed the maximum allowable tongue weight for the vehicle. Choose the shortest hitch extension that will position the hitch ball closest to the vehicle. This will help reduce the effect of trailer tongue weight on the rear axle. Trailer rating may be limited by the vehicle's ability to carry tongue weight. Tongue weight cannot cause the vehicle to exceed the GVWR (Gross Vehicle Weight Rating) or the RGAWR (Rear Gross Axle Weight Rating). See “Total Weight on the Vehicle's Tires” following. After loading the trailer, weigh the trailer and then the tongue, separately, to see if the weights are
proper. If they are not, adjustments might be made by moving some items around in the trailer. If a cargo carrier is used in the trailer hitch receiver, choose a carrier that positions the load as close to the vehicle as possible. Make sure the total weight, including the carrier, is no more than half of the maximum allowable tongue weight for the vehicle or 227 kg (500 lb), whichever is less. Total Weight on the Vehicle's Tires Be sure the vehicle's tires are inflated to the inflation pressures found on the Certification label on the center pillar or see Vehicle Load Limits on page 9-14.
Make sure not to exceed the GVWR limit for the vehicle, or the RGAWR, with the tow vehicle and trailer fully loaded for the trip including the weight of the trailer tongue. If using a weight-distributing hitch, make sure not to exceed the RGAWR before applying the weight distribution spring bars. Weight of the Trailering Combination It is important that the combination of the tow vehicle and trailer does not exceed any of its weight ratings — GCWR, GVWR, RGAWR, Trailer Weight Rating, or Tongue Weight. The only way to be sure it is not exceeding any of these ratings is to weigh the tow vehicle and trailer combination, fully loaded for the trip, getting individual weights for each of these items.
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9-82
Driving and Operating
Towing Equipment
Hitches The correct hitch equipment helps maintain combination control. Most small-to-medium trailers can be towed with a weight-carrying hitch which simply features a coupler latched to the hitch ball. Larger trailers may require a weight-distributing hitch that uses spring bars to distribute the trailer tongue weight among the two vehicle and trailer axles. See “Weight of the Trailer Tongue” in Trailer Towing on page 9-77 for rating limits with various hitch types. Consider using sway controls with any trailer. Ask a trailering professional about sway controls or refer to the trailer manufacturer's recommendations and instructions.
Weight-Distributing Hitch Adjustment
1. Body to Ground Distance 2. Front of Vehicle
When using a weight-distributing hitch, the spring bars should be adjusted so the distance (1) is the same after coupling the trailer to the tow vehicle and adjusting the hitch. Safety Chains Always attach chains between the vehicle and the trailer. Cross the safety chains under the tongue of
the trailer to help prevent the tongue from contacting the road if it becomes separated from the hitch. Instructions about safety chains may be provided by the hitch manufacturer or by the trailer manufacturer. If the trailer being towed weighs up to 2 271 kg (5,000 lb) with a factory-installed step bumper, safety chains may be attached to the attaching points on the bumper, otherwise, safety chains should be attached to holes on the trailer hitch platform. Always leave just enough slack so the combination can turn. Never allow safety chains to drag on the ground. Trailer Brakes A loaded trailer that weighs more than 900 kg (2,000 lb) needs to have its own brake system that is adequate for the weight of the trailer. Be sure to read and follow the instructions for the trailer brakes so they are installed, adjusted, and maintained properly.
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Since the vehicle is equipped with StabiliTrak, the trailer brakes cannot tap into the vehicle's hydraulic system. Trailer Wiring Harness The seven-pin trailer connector is mounted in the bumper. This connector can be plugged into a seven-pin universal heavy-duty trailer connector available through your dealer. The seven-wire harness contains the following trailer circuits: . Yellow: Left Stop/Turn Signal . Green/Violet: Right Stop/Turn
Signal
. Brown: Taillamps . White: Ground
Light Green: Back-up Lamps
. Red/Green: Battery Feed . Dark Blue: Trailer Brake
If charging a remote (non-vehicle) battery, press the Tow/Haul mode button at the end of the shift lever. This will boost the vehicle system voltage and properly charge the battery. If the trailer is too light for Tow/Haul mode, turn on the headlamps as a second way to boost the vehicle system and charge the battery. Electric Brake Control Wiring Provisions These wiring provisions are included with the vehicle as part of the trailer wiring package. These provisions are for an electric brake controller. The harness should be installed by your dealer or a qualified service center.
Driving and Operating
9-83
Tow/Haul Mode
Pressing this button at the end of the shift lever turns on and off the Tow/Haul Mode.
This indicator light on the instrument cluster comes on when the Tow/ Haul Mode is on.
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Driving and Operating
Tow/Haul is a feature that assists when pulling a heavy trailer or a large or heavy load. See Tow/Haul Mode on page 9-36. Tow/Haul is designed to be most effective when the vehicle and trailer combined weight is at least 75 percent of the vehicle's Gross Combined Weight Rating (GCWR). See “Weight of the Trailer” under Trailer Towing on page 9-77. Tow/ Haul is most useful under the following driving conditions: . When pulling a heavy trailer or a
large or heavy load through rolling terrain.
. When pulling a heavy trailer or a
large or heavy load in stop-and-go traffic.
. When pulling a heavy trailer or a
large or heavy load in busy parking lots where improved low speed control of the vehicle is desired.
Operating the vehicle in Tow/Haul when lightly loaded or with no trailer at all will not cause damage. However, there is no benefit to the selection of Tow/Haul when the vehicle is unloaded. Such a selection when unloaded may result in unpleasant engine and transmission driving characteristics and reduced fuel economy. Tow/ Haul is recommended only when pulling a heavy trailer or a large or heavy load. Integrated Trailer Brake Control System
The vehicle may have an Integrated Trailer Brake Control (ITBC) system for use with electric trailer brakes or most electric-over-hydraulic trailer brakes.
This symbol is on the Trailer Brake Control Panel on vehicles with an ITBC system. The power output to the trailer brakes is based on the amount of brake pressure being applied by the vehicle’s brake system, and on the type of trailer brakes detected. This available power output to the trailer brakes can be adjusted to a wide range of trailering situations. The ITBC system is integrated with the vehicle’s brake, antilock brake, and StabiliTrak systems. In trailering conditions that cause the vehicle’s antilock brake or StabiliTrak systems to activate, power sent to the trailer's brakes will be automatically adjusted to minimize trailer wheel lock-up. This does not imply that the trailer has StabiliTrak. If the vehicle’s brake, antilock brake, or StabiliTrak systems are not functioning properly, the ITBC system may not be fully functional or may not function at all.
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Make sure all of these systems are fully operational to ensure full functionality of the ITBC system. The ITBC system is powered through the vehicle's electrical system. Turning the ignition off will also turn off the ITBC system. The ITBC system is fully functional only when the ignition is in ON/RUN.
{ Warning
Connecting a trailer that has an air brake system may result in reduced or complete loss of trailer braking. There may be an increase in stopping distance or trailer instability which could result in personal injury or damage to the vehicle, trailer, or other property. Use the ITBC system only with electric or electric over hydraulic trailer brakes.
Trailer Brake Control Panel
1. Manual Trailer Brake Apply
Lever
2. Trailer Gain Adjustment
Buttons
The ITBC system has a control panel on the instrument panel to the left of the steering column. The control panel allows adjustment to the amount of output, referred to as Trailer Gain, available to the trailer brakes and allows manual application of the trailer brakes. The Trailer Brake Control Panel is used
Driving and Operating
9-85
along with the Trailer Brake Display Page on the DIC to adjust and display power output to the trailer brakes.
Trailer Brake DIC Display Page The ITBC system displays messages in the Driver Information Center (DIC). The display page indicates Trailer Gain setting, power output to the trailer brakes, trailer connection, and system operational status. To display the Trailer Brake Display Page do any of the following: . Scroll through the DIC menu
pages.
. Press a Trailer Gain button.
If the Trailer Brake Display Page is not currently displayed, press a Trailer Gain button to recall the current Trailer Gain setting. Each press and release of the gain buttons will then change the Trailer Gain setting.
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Driving and Operating
. Activate the Manual Trailer
. A trailer with electric brakes has
Brake apply lever.
TRAILER GAIN: This setting can be adjusted from 0.0 to 10.0 with either a trailer connected or disconnected. To adjust the Trailer Gain, press one of the Trailer Gain adjustment buttons. Press and hold a gain button to continuously adjust the Trailer Gain. To turn the output to the trailer off, adjust the Trailer Gain setting to 0.0 (zero). TRAILER OUTPUT: Displays any time a trailer with electric brakes is connected. Output to the trailer brakes is based on the amount of vehicle braking present and relative to the Trailer Gain setting. Output is displayed from 0 to 100% for each gain setting. The Trailer Output will indicate “- - - - - -” on the Trailer Brake Display Page whenever the following occur: . No trailer is connected. . A trailer without electric brakes is connected (no DIC message displayed).
become disconnected (a CHECK TRAILER WIRING message will also display on the DIC). There is a fault present in the wiring to the trailer brakes (a CHECK TRAILER WIRING message will also display on the DIC). The ITBC system is not working due to a fault (a SERVICE TRAILER BRAKE SYSTEM message will also display in the DIC).
Manual Trailer Brake Apply The Manual Trailer Brake Apply Lever is used to apply the trailer’s electric brakes independent of the vehicle’s brakes. Sliding the lever to the left will apply only the trailer brakes. Use this lever to adjust Trailer Gain to properly adjust the power output to the trailer brakes.
The trailer's and the vehicle's brake lamps will come on when either vehicle brakes or manual trailer brakes are applied.
Trailer Gain Adjustment Procedure Trailer Gain should be set for a specific trailering condition and must be adjusted any time vehicle loading, trailer loading, or road surface conditions change. { Warning Trailer brakes that are over-gained or under-gained may not stop the vehicle and the trailer as intended and can result in a crash. Always follow the instructions to set the Trailer Gain for the proper trailer stopping performance.
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Use the following to adjust Trailer Gain for each towing condition: 1. Drive the vehicle with the trailer attached on a level road surface representative of the towing condition and free of traffic at about 32 to 40 km/h (20 to 25 mph) and fully apply the Manual Trailer Brake apply lever. Adjusting Trailer Gain at speeds lower than 32 to 40 km/h (20 to 25 mph) may result in an incorrect gain setting.
2. Adjust the Trailer Gain, using the Trailer Gain adjustment buttons, to just below the point of trailer wheel lock-up, indicated by trailer wheel squeal or tire smoke when a trailer wheel locks. Trailer wheel lock-up may not occur if towing a heavily loaded trailer. In this case, adjust the Trailer Gain to the highest allowable setting for the towing condition.
3. Readjust Trailer Gain any time vehicle loading, trailer loading, or road surface conditions change or if trailer wheel lock-up is noticed at any time while towing.
Other ITBC-Related DIC Messages In addition to displaying TRAILER GAIN and OUTPUT through the DIC, trailer connection and ITBC system status are displayed on the DIC. TRAILER CONNECTED: This message will briefly display when a trailer with electric brakes is first connected to the vehicle. This message will automatically turn off in about 10 seconds. This message can be acknowledged before it automatically turns off.
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CHECK TRAILER WIRING: This message will display if:
The ITBC system first determines connection to a trailer with electric brakes and then the trailer harness becomes disconnected from the vehicle. If the disconnect occurs while the vehicle is stationary, this message will automatically turn off in about 30 seconds. This message will also turn off if it is acknowledged or if the trailer harness is reconnected. If the disconnect occurs while the vehicle is moving, this message will continue until the ignition is turned off. This message will also turn off if it is acknowledged or if the trailer harness is reconnected. There is an electrical fault in the wiring to the trailer brakes. This message will continue as long as there is an electrical fault in
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Driving and Operating
the trailer wiring. This message will also turn off if it is acknowledged.
To determine if the electrical fault is on the vehicle side or trailer side of the trailer wiring harness connection: 1. Disconnect the trailer wiring
harness from the vehicle.
2. Turn the ignition off. 3. Wait 10 seconds, then turn the
4.
ignition back to RUN. If the CHECK TRAILER WIRING message reappears, the electrical fault is on the vehicle side. If the CHECK TRAILER WIRING message only reappears when connecting the trailer wiring harness to the vehicle, the electrical fault is on the trailer side.
SERVICE TRAILER BRAKE SYSTEM: This message will display when there is a problem with the ITBC system. If this message
continues over multiple ignition cycles, there is a problem with the ITBC system. Have the vehicle serviced. If either the CHECK TRAILER WIRING or SERVICE TRAILER BRAKE SYSTEM message displays while driving, the ITBC system may not be fully functional or may not function at all. When traffic conditions allow, carefully pull the vehicle over to the side of the road and turn the ignition off. Check the wiring connection to the trailer and turn the ignition back on. If either of these messages continues, either the vehicle or trailer needs service. A GM dealer may be able to diagnose and repair problems with the trailer. However, any diagnosis and repair of the trailer is not covered under the vehicle warranty. Contact your trailer dealer for assistance with trailer repairs and trailer warranty information.
Trailer Sway Control (TSC) Vehicles with StabiliTrak have a TSC feature. Trailer sway is unintended side-to-side motion of a trailer while being towed. If the vehicle is towing a trailer and the TSC detects that sway is increasing, the vehicle brakes are selectively applied at each wheel, to help reduce excessive trailer sway. If the vehicle is equipped with the Integrated Trailer Brake Control (ITBC) system, and the trailer has the electric actuated brake system, StabiliTrak may also apply the trailer brakes. If TSC is enabled, the Traction Control System (TCS)/StabiliTrak warning light will flash on the instrument cluster. Vehicle speed must be reduced. If trailer sway continues, StabiliTrak can reduce engine torque to help slow the vehicle. See Traction Control/ Electronic Stability Control on page 9-44.
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Driving and Operating
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Add-on equipment can drain the vehicle's 12-volt battery, even if the vehicle is not operating. The vehicle has an airbag system. Before attempting to add anything electrical to the vehicle, see Servicing the Airbag-Equipped Vehicle on page 3-41 and Adding Equipment to the Airbag-Equipped Vehicle on page 3-42.
Conversions and Add-Ons
Add-On Electrical Equipment
{ Caution
Some electrical equipment can damage the vehicle or cause components to not work and would not be covered by the warranty. Always check with your dealer before adding electrical equipment.
{ Warning
Even if the vehicle is equipped with TSC, trailer sway could result in loss of control and the vehicle could crash. If excessive trailer sway is detected, slow down to a safe speed. Check the trailer and vehicle to help correct possible causes. These could include an improperly or overloaded trailer, unrestrained cargo, improper trailer hitch configuration, excessive vehicle-trailer speed, or improperly inflated or incorrect vehicle or trailer tires. See Towing Equipment on page 9-82 for trailer ratings and hitch setup recommendations.
Adding non-dealer accessories can affect the vehicle performance. See Accessories and Modifications on page 10-3.
Chevrolet 2015i Tahoe/Suburban Owner Manual Canada/Mexico-8431502) - 2015 - CRC - 8/8/14
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9-90
Driving and Operating
2 NOTES
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Vehicle Care
General Information
General Information . . . . . . . . . . 10-2
California Proposition65 Warning . . . . . . . . . . . . . . . . . 10-3
California Perchlorate
Materials Requirements . . . . 10-3
Accessories and
Modifications . . . . . . . . . . . . . . . 10-3
Vehicle Checks Doing Your Own
Service Work . . . . . . . . . . . . . . . 10-4
Hood . . . . . . . . . . . . . . . . . . . . . . . . 10-5
Engine CompartmentOverview . . . . . . . . . . . . . . . . . . . 10-6
Engine Oil . . . . . . . . . . . . . . . . . . . 10-7
Engine Oil Life System . . . . . 10-10
Automatic TransmissionFluid . . . . . . . . . . . . . . . . . . . . . . 10-11
Engine Air Cleaner/Filter . . . . 10-14
Cooling System . . . . . . . . . . . . 10-15
Engine Coolant . . . . . . . . . . . . . 10-16
Engine Overheating . . . . . . . . 10-19
Engine Fan . . . . . . . . . . . . . . . . . 10-21
Washer Fluid . . . . . . . . . . . . . . . 10-21
Brakes . . . . . . . . . . . . . . . . . . . . . 10-22Brake Fluid . . . . . . . . . . . . . . . . . 10-23
Battery . . . . . . . . . . . . . . . . . . . . . 10-24
Four-Wheel Drive . . . . . . . . . . . 10-25
Front Axle . . . . . . . . . . . . . . . . . . 10-26
Rear Axle . . . . . . . . . . . . . . . . . . 10-26
Noise Control System . . . . . . 10-27
Starter Switch Check . . . . . . . 10-28
Automatic Transmission ShiftLock Control Function Check . . . . . . . . . . . . . . . . . . . . . 10-28
Ignition Transmission Lock
Check . . . . . . . . . . . . . . . . . . . . . 10-28
Park Brake and P (Park)
Mechanism Check . . . . . . . . 10-29
Wiper Blade
Replacement . . . . . . . . . . . . . . 10-29
Glass Replacement . . . . . . . . 10-30Headlamp Aiming
Headlamp Aiming . . . . . . . . . . 10-30
Bulb Replacement
Bulb Replacement . . . . . . . . . . 10-31
Halogen Bulbs . . . . . . . . . . . . . . 10-31
High Intensity Discharge(HID) Lighting . . . . . . . . . . . . . 10-31
LED Lighting . . . . . . . . . . . . . . . 10-31
Headlamps . . . . . . . . . . . . . . . . . 10-31
Fog Lamps . . . . . . . . . . . . . . . . . 10-32Vehicle Care
10-1
Front Turn Signal Lamps . . . 10-32
Taillamps, Turn Signal,Stoplamps, and Back-Up Lamps . . . . . . . . . . . . . . . . . . . . 10-32
License Plate Lamp . . . . . . . . 10-34
Replacement Bulbs . . . . . . . . . 10-35Electrical System
Electrical System
Overload . . . . . . . . . . . . . . . . . . 10-35
Fuses . . . . . . . . . . . . . . . . . . . . . . 10-36
Engine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . 10-36
Instrument Panel Fuse
Block (Left) . . . . . . . . . . . . . . . 10-40
Instrument Panel Fuse Block
(Right) . . . . . . . . . . . . . . . . . . . . 10-42
Rear Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . 10-45
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . 10-46
All-Season Tires . . . . . . . . . . . . 10-47
Winter Tires . . . . . . . . . . . . . . . . 10-47
Low-Profile Tires . . . . . . . . . . . 10-48
All-Terrain Tires . . . . . . . . . . . . 10-48
Tire Sidewall Labeling . . . . . . 10-48
Tire Designations . . . . . . . . . . . 10-50Chevrolet 2015i Tahoe/Suburban Owner Manual Canada/Mexico-8431502) - 2015 - CRC - 8/8/14
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10-2
Vehicle Care
Jump Starting
Jump Starting . . . . . . . . . . . . . . 10-79
Towing the Vehicle
Towing the Vehicle . . . . . . . . . 10-83
Recreational VehicleTowing . . . . . . . . . . . . . . . . . . . . 10-83
Appearance Care
Exterior Care . . . . . . . . . . . . . . . 10-88
Interior Care . . . . . . . . . . . . . . . . 10-93
Floor Mats . . . . . . . . . . . . . . . . . . 10-96General Information For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people. Genuine GM parts have one of these marks:
Tire Terminology and
Definitions . . . . . . . . . . . . . . . . 10-51
Tire Pressure . . . . . . . . . . . . . . . 10-53
Tire Pressure for High-SpeedOperation . . . . . . . . . . . . . . . . . 10-55
Tire Pressure Monitor
System . . . . . . . . . . . . . . . . . . . 10-55
Tire Pressure Monitor
Operation . . . . . . . . . . . . . . . . . 10-56
Tire Inspection . . . . . . . . . . . . . . 10-60
Tire Rotation . . . . . . . . . . . . . . . 10-60
When It Is Time for NewTires . . . . . . . . . . . . . . . . . . . . . . 10-61
Buying New Tires . . . . . . . . . . . 10-62
Different Size Tires andWheels . . . . . . . . . . . . . . . . . . . 10-64
Uniform Tire Quality
Grading . . . . . . . . . . . . . . . . . . . 10-64
Wheel Alignment and Tire
Balance . . . . . . . . . . . . . . . . . . . 10-66
Wheel Replacement . . . . . . . . 10-66
Tire Chains . . . . . . . . . . . . . . . . . 10-67
If a Tire Goes Flat . . . . . . . . . . 10-68
Tire Changing . . . . . . . . . . . . . . 10-69
Full-Size Spare Tire . . . . . . . . 10-78Chevrolet 2015i Tahoe/Suburban Owner Manual Canada/Mexico-8431502) - 2015 - CRC - 8/8/14
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Vehicle Care
10-3
GM Accessories are designed to complement and function with other systems on the vehicle. See your dealer to accessorize the vehicle using genuine GM Accessories installed by a dealer technician. Also, see Adding Equipment to the Airbag-Equipped Vehicle on page 3-42.
California Proposition 65 Warning Most motor vehicles, including this one, contain and/or emit chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Engine exhaust, many parts and systems, many fluids, and some component wear by-products contain and/or emit these chemicals.
California Perchlorate Materials Requirements Certain types of automotive applications, such as airbag initiators, safety belt pretensioners, and lithium batteries contained in Remote Keyless Entry transmitters, may contain perchlorate materials. Special handling may be necessary. For additional information, see www.dtsc.ca.gov/hazardouswaste/ perchlorate.
Accessories and Modifications Adding non‐dealer accessories or making modifications to the vehicle can affect vehicle performance and safety, including such things as airbags, braking, stability, ride and handling, emissions systems, aerodynamics, durability, and electronic systems like antilock brakes, traction control, and stability control. These accessories or modifications could even cause malfunction or damage not covered by the vehicle warranty. Damage to vehicle components resulting from modifications or the installation or use of non‐GM certified parts, including control module or software modifications, is not covered under the terms of the vehicle warranty and may affect remaining warranty coverage for affected parts.
Chevrolet 2015i Tahoe/Suburban Owner Manual Canada/Mexico-8431502) - 2015 - CRC - 8/8/14
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10-4
Vehicle Care
Vehicle Checks
Doing Your Own Service Work
{ Warning
It can be dangerous to work on your vehicle if you do not have the proper knowledge, service manual, tools, or parts. Always follow owner manual procedures and consult the service manual for your vehicle before doing any service work.
If doing some of your own service work, use the proper service manual. It tells you much more about how to service the vehicle than this manual can. To order the proper service manual, see Service Publications Ordering Information on page 13-11. This vehicle has an airbag system. Before attempting to do your own service work, see Servicing the Airbag-Equipped Vehicle on page 3-41.
Keep a record with all parts receipts and list the mileage and the date of any service work performed. See Maintenance Records on page 11-16.
{ Caution Even small amounts of contamination can cause damage to vehicle systems. Do not allow contaminants to contact the fluids, reservoir caps, or dipsticks.
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Vehicle Care
10-5
Before closing the hood, be sure all the filler caps are on properly. Then bring the hood from full open to within 15 cm (6 in) from the closed position, pause, and push the front center of the hood with a swift, firm motion to fully close the hood.
Hood To open the hood:
1. Pull the handle with this symbol
on it. It is inside the vehicle under the steering wheel.
2. Go to the front of the vehicle to
find the secondary hood release. The handle is under the front edge of the hood near the center. Push the handle to the right and at the same time raise the hood.
Chevrolet 2015i Tahoe/Suburban Owner Manual Canada/Mexico-8431502) - 2015 - CRC - 8/8/14
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10-6
Vehicle Care
Engine Compartment Overview
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1. Positive (+) Terminal. See Jump
10. Windshield Washer Fluid
Starting on page 10-79. 2. Battery on page 10-24. 3. Coolant Surge Tank and
Pressure Cap. See Cooling System on page 10-15.
4. Engine Air Cleaner/Filter on
page 10-14.
5. Automatic Transmission
Dipstick. See “How to Check Automatic Transmission Fluid” under Automatic Transmission Fluid on page 10-11.
6. Remote Negative (–) Location
(Out of View). See Jump Starting on page 10-79.
7. Engine Cooling Fans (Out of
View). See Cooling System on page 10-15.
8. Engine Oil Fill Cap. See “When to Add Engine Oil” under Engine Oil on page 10-7.
9. Engine Oil Dipstick. See
“Checking Engine Oil” under Engine Oil on page 10-7.
Reservoir. See “Adding Washer Fluid” under Washer Fluid on page 10-21.
11. Brake Fluid Reservoir. See Brake Fluid on page 10-23. 12. Engine Compartment Fuse
Block on page 10-36.
Engine Oil To ensure proper engine performance and long life, careful attention must be paid to engine oil. Following these simple, but important steps will help protect your investment: . Always use engine oil approved to the proper specification and of the proper viscosity grade. See “Selecting the Right Engine Oil” in this section.
. Check the engine oil level regularly and maintain the proper oil level. See “Checking Engine Oil” and “When to Add Engine Oil” in this section.
Vehicle Care
10-7
. Change the engine oil at the
appropriate time. See Engine Oil Life System on page 10-10. . Always dispose of engine oil
properly. See “What to Do with Used Oil” in this section.
Checking Engine Oil If equipped, the ENGINE OIL LOW ADD OIL message displays when the engine oil level may be too low. See Engine Oil Messages on page 5-38. Check the oil level before filling to the recommended level. If the oil is not low and this message remains on, see your dealer. It is also a good idea to check the engine oil level at each fuel fill. In order to get an accurate reading, the vehicle must be on level ground. The engine oil dipstick handle is a loop. See Engine Compartment Overview on page 10-6 for the location of the engine oil dipstick.
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Vehicle Care
Obtaining an accurate oil level reading is essential: 1.
If the engine has been running recently, turn off the engine and allow several minutes for the oil to drain back into the oil pan. Checking the oil level too soon after engine shutoff will not provide an accurate oil level reading.
{ Warning
The engine oil dipstick handle may be hot; it could burn you. Use a towel or glove to touch the dipstick handle.
2. Pull out the dipstick and wipe it
with a clean paper towel or cloth, then push it back in all the way. Remove it again, keeping the tip down, and check the level.
When to Add Engine Oil
If the oil is below the cross-hatched area at the tip of the dipstick, add 1 L (1 qt) of the recommended oil and then recheck the level. See “Selecting the Right Engine Oil” in this section for an explanation of what kind of oil to use. For engine oil crankcase capacity, see Capacities and Specifications on page 12-2.
{ Caution
Do not add too much oil. Oil levels above or below the acceptable operating range shown on the dipstick are harmful to the engine. If you find that you
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Caution (Continued)
have an oil level above the operating range, i.e., the engine has so much oil that the oil level gets above the cross-hatched area that shows the proper operating range, the engine could be damaged. You should drain out the excess oil or limit driving of the vehicle and seek a service professional to remove the excess amount of oil.
See Engine Compartment Overview on page 10-6 for the location of the engine oil fill cap. Add enough oil to put the level somewhere in the proper operating range. Push the dipstick all the way back in when through.
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Selecting the Right Engine Oil Selecting the right engine oil depends on both the proper oil specification and viscosity grade. See Recommended Fluids and Lubricants on page 11-13.
Specification Ask for and use engine oils that meet the dexos1™ specification. Engine oils that have been approved by GM as meeting the dexos1 specification are marked with the dexos1 approved logo. See www.gmdexos.com.
{ Caution
Failure to use the recommended engine oil can result in engine damage not covered by the vehicle warranty. Check with your dealer or service provider on whether the oil is approved to the dexos1 specification.
Viscosity Grade Use SAE 0W-20 viscosity grade engine oil. When selecting an oil of the appropriate viscosity grade, always select an oil of the correct specification. See “Specification” earlier in this section for more information.
Vehicle Care
10-9
Engine Oil Additives/Engine Oil Flushes Do not add anything to the oil. The recommended oils meeting the dexos1 specification are all that is needed for good performance and engine protection. Engine oil system flushes are not recommended and could cause engine damage not covered by the vehicle warranty. What to Do with Used Oil Used engine oil contains certain elements that can be unhealthy for your skin and could even cause cancer. Do not let used oil stay on your skin for very long. Clean your skin and nails with soap and water, or a good hand cleaner. Wash or properly dispose of clothing or rags containing used engine oil. See the manufacturer's warnings about the use and disposal of oil products. Used oil can be a threat to the environment. If you change your own oil, be sure to drain all the oil
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Vehicle Care
from the filter before disposal. Never dispose of oil by putting it in the trash or pouring it on the ground, into sewers, or into streams or bodies of water. Recycle it by taking it to a place that collects used oil.
Engine Oil Life System
When to Change Engine Oil This vehicle has a computer system that indicates when to change the engine oil and filter. This is based on a combination of factors which include engine revolutions, engine temperature, and miles driven. Based on driving conditions, the mileage at which an oil change is indicated can vary considerably. For the oil life system to work properly, the system must be reset every time the oil is changed. On some vehicles, when the system has calculated that oil life has been diminished, a CHANGE ENGINE OIL SOON message comes on to indicate that an oil change is necessary. See
Engine Oil Messages on page 5-38. Change the oil as soon as possible within the next 1 000 km (600 mi). It is possible that, if driving under the best conditions, the oil life system might indicate that an oil change is not necessary for up to a year. The engine oil and filter must be changed at least once a year and, at this time, the system must be reset. For vehicles without the CHANGE ENGINE OIL SOON message, an oil change is needed when the OIL LIFE REMAINING percentage is near 0%. Your dealer has trained service people who will perform this work and reset the system. It is also important to check the oil regularly over the course of an oil drain interval and keep it at the proper level. If the system is ever reset accidentally, the oil must be changed at 5 000 km (3,000 mi) since the last oil change. Remember to reset the oil life system whenever the oil is changed.
How to Reset the Engine Oil Life System Reset the system whenever the engine oil is changed so that the system can calculate the next engine oil change. Always reset the engine oil life to 100% after every oil change. It will not reset itself. To reset the engine oil life system: 1. Display the OIL LIFE
REMAINING on the DIC. If the vehicle does not have DIC buttons, the vehicle must be in P (Park) to access this display. See Driver Information Center (DIC) (Base Level) on page 5-30
or Driver Information Center (DIC) (Uplevel) on page 5-32.2. Press and hold V, or the trip
odometer reset stem if the vehicle does not have DIC buttons, for several seconds. The oil life will change to 100%.
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The oil life system can also be reset as follows: 1. Turn the ignition to ON/RUN with
the engine off.
2. Fully press the accelerator pedal
slowly three times within five seconds.
3. Display the OIL LIFE
REMAINING on the DIC. If the display shows 100%, the system is reset.
If the vehicle has a CHANGE ENGINE OIL SOON message and it comes back on when the vehicle is started and/or the OIL LIFE REMAINING is near 0%, the engine oil life system has not been reset. Repeat the procedure.
Automatic Transmission Fluid
When to Check and Change Automatic Transmission Fluid It is usually not necessary to check the transmission fluid level. The only reason for fluid loss is a transmission leak or overheated transmission. If a small leak is suspected, then use the following checking procedures to check the fluid level. However, if there is a large leak, then it may be necessary to have the vehicle towed to a dealer service department and have it repaired before driving the vehicle further.
{ Caution
Use of the incorrect automatic transmission fluid may damage the vehicle, and the damage may not be covered by the vehicle warranty. Always use the
(Continued)
Vehicle Care
10-11
Caution (Continued)
automatic transmission fluid listed in Recommended Fluids and Lubricants on page 11-13.
Change the fluid and filter at the scheduled maintenance intervals listed in Maintenance Schedule on page 11-3. Be sure to use the transmission fluid listed in Recommended Fluids and Lubricants on page 11-13. How to Check Automatic Transmission Fluid
{ Caution
Too much or too little fluid can damage the transmission. Too much can mean that some of the fluid could come out and fall on hot engine parts or exhaust system parts, starting a fire. Too little fluid could cause the
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Vehicle Care
Caution (Continued)
transmission to overheat. Be sure to get an accurate reading if checking the transmission fluid.
Before checking the fluid level, prepare the vehicle: 1. Start the engine and park the
vehicle on a level surface. Keep the engine running.
2. Apply the parking brake and
place the shift lever in P (Park).
3. With your foot on the brake pedal, move the shift lever through each gear range, pausing for about three seconds in each range. Then, move the shift lever back to P (Park).
4. Allow the engine to idle (500–
800 rpm) for at least one minute. Slowly release the brake pedal.
5. Keep the engine running and
check the transmission fluid temperature on the
Driver Information Center (DIC). See Driver Information Center (DIC) (Base Level) on page 5-30
or Driver Information Center (DIC) (Uplevel) on page 5-32.Use this cold check procedure to check fluid level when the transmission temperature is between 27°C and 32°C (80°F and 90°F).
6. Using the transmission fluid
temperature reading, determine and perform the appropriate check procedure. If the transmission fluid temperature reading is not within the required temperature ranges, allow the vehicle to cool, or operate the vehicle until the appropriate transmission fluid temperature is reached.
Cold Check Procedure Use this procedure only as a reference to determine if the transmission has enough fluid to be operated safely until a hot check procedure can be made. The hot check procedure is the most accurate method to check the fluid level. Perform the hot check procedure at the first opportunity.
1. Locate the transmission dipstick
at the rear of the engine compartment, on the passenger side of the vehicle. See Engine Compartment Overview on page 10-6.
2. Flip the handle up, then pull out
3.
the dipstick and wipe it with a clean rag or paper towel. Install the dipstick by pushing it back in all the way; wait three seconds, and then pull it back out again.
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4. Check both sides of the dipstick and read the lower level. Repeat the check procedure to verify the reading.
5.
If the fluid level is below the COLD check band, add only enough fluid as necessary to bring the level into the COLD band. It does not take much fluid, generally less than 0.5 L (1 pt). Do not overfill. 6. Perform a hot check at the
first opportunity after the transmission reaches a normal operating temperature between 71°C to 93°C (160°F to 200°F).
7.
If the fluid level is in the acceptable range, push the dipstick back in all the way, then flip the handle down to lock the dipstick in place.
Hot Check Procedure Use this procedure to check the transmission fluid level when the transmission fluid temperature is between 71°C and 93°C (160°F and 200°F). The hot check is the most accurate method to check the fluid level. The hot check should be performed at the first opportunity in order to verify the cold check. The fluid level rises as fluid temperature increases, so it is important to ensure the transmission temperature is within range.
Vehicle Care
10-13
1. Locate the transmission dipstick
at the rear of the engine compartment, on the passenger side of the vehicle. See Engine Compartment Overview on page 10-6.
2. Flip the handle up, then pull out
3.
the dipstick and wipe it with a clean rag or paper towel. Install the dipstick by pushing it back in all the way; wait three seconds, and then pull it back out again.
4. Check both sides of the dipstick and read the lower level. Repeat
