2008 Chevrolet Silverado Owners Manual

A rear blowout, particularly on a curve, acts much like a skid and may require the same correction you would use in a skid. In any rear blowout remove your foot from the accelerator pedal. Get the vehicle under control by steering the way you want the vehicle to go. It may be very bumpy and noisy, but you can still steer. Gently brake to a stop, well off the road if possible.

{CAUTION:

Lifting a vehicle and getting under it to do maintenance or repairs is dangerous without the appropriate safety equipment and training. The jack provided with your vehicle is designed only for changing a flat tire. If it is used for anything else, you or others could be badly injured or killed if the vehicle slips off the jack. Use the jack provided with your vehicle only for changing a flat tire.

If a tire goes flat, the next part shows how to use the jacking equipment to change a flat tire safely.

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CAUTION:

(Continued)

To be even more certain the vehicle will not move, put blocks at the front and rear of the tire farthest away from the one being changed. That would be the tire on the other side, at the opposite end of the vehicle.

When your vehicle has a flat tire, use the following example as a guide to assist you in the placement of the wheel blocks.

Changing a Flat Tire If a tire goes flat, avoid further tire and wheel damage by driving slowly to a level place. Turn on your hazard warning flashers. See Hazard Warning Flashers on page 3-8 for more information.

{CAUTION:

Changing a tire can be dangerous. The vehicle can slip off the jack and roll over or fall on you or other people. You and they could be badly injured or even killed. Find a level place to change your tire. To help prevent the vehicle from moving:

1. Set the parking brake firmly. 2. Put the shift lever in PARK (P). 3. If you have a four-wheel-drive vehicle,

be sure the transfer case is in a drive gear – not in NEUTRAL.

4. Turn off the engine and do not restart

while the vehicle is raised.

5. Do not allow passengers to remain in

the vehicle.

CAUTION:

(Continued)

The following information will tell you next how to use the jack and change a tire.

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Removing the Spare Tire and Tools

Crew Cab

A. Wing Nut

Retaining Tool Kit

B. Tool Kit C. Wheel Blocks

D. Jack E. Wing Nut Retaining

Wheel Blocks

Regular Cab

A. Wing Nut Retaining

Wheel Blocks B. Wheel Blocks C. Wing Nut Retaining

Tool Kit

D. Tool Kit E. Jack F. Knob

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For regular cab models, the equipment you will need is behind the passenger’s seat. For extended and crew cab models, the equipment is on the shelf behind the passenger’s side second row seat. 1. Turn the knob on the jack counterclockwise to lower the jack head to release the jack from its holder.

2. Remove the wheel blocks and the wheel block

retainer by turning the wing nut counterclockwise. 3. Remove the wing nut used to retain the storage

bag and tools by turning it counterclockwise.

Extended Cab

A. Wing Nut

Retaining Tool Kit

B. Tool Kit

C. Wheel Blocks D. Jack E. Knob

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You will use the jack handle extensions and the wheel wrench to remove the underbody-mounted spare tire.

G. Hoist Shaft

Access Hole

H. Wheel Wrench

I. Jack Handle

Extensions

J. Spare Tire Lock

(If equipped)

1. Open the spare tire lock cover on the bumper and use the ignition key to remove the spare tire lock (J). To remove the spare tire lock, insert the ignition key turn and pull straight out.

A. Spare Tire (Valve

Stem Pointed Down)

B. Hoist Assembly C. Hoist Cable

D. Tire/Wheel

Retainer

E. Hoist Shaft F. Hoist End of

Extension Tool

2. Assemble the wheel wrench (H) and the two jack

handle extensions (I) as shown.

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3. Insert the hoist end

(open end) (F) of the extension through the hole (G) in the rear bumper. Do not use the chiseled end of the wheel wrench.

4. Turn the wheel wrench (H) counterclockwise to lower the spare tire to the ground. Continue to turn the wheel wrench until the spare tire can be pulled out from under the vehicle. If the spare tire does not lower to the ground, the secondary latch is engaged causing the tire not to lower. See Secondary Latch System on page 5-106.

Be sure the hoist end of the extension (F) connects to the hoist shaft (E). The ribbed square end of the extension is used to lower the spare tire.

5. Use the wheel wrench

hook which allows you to pull the hoist cable towards you to assist in reaching the spare tire.

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Once the retainer is separated from the guide pin, tilt the retainer and pull it through the center of the wheel along with the cable and guide latch.

7. Put the spare tire near the flat tire.

6. Tilt the tire toward the vehicle with some slack

in the cable to access the tire/wheel retainer. Separate the retainer from the guide pin by sliding the retainer up the pin while pressing down on the latch.

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Removing the Flat Tire and Installing the Spare Tire Use the following pictures and instructions to remove the flat tire and raise the vehicle.

2. If your vehicle has

wheel nut caps, loosen them by turning the wheel wrench counterclockwise.

If the vehicle has a center cap with wheel nut caps, the wheel nut caps are designed to stay with the center cap after they are loosened. Remove the entire center cap.

The tools you will be using include the jack (A), the wheel blocks (B), the jack handle (C), the jack handle extensions (D), and the wheel wrench (E). 1. Do a safety check before proceeding.

See Changing a Flat Tire on page 5-94
for more information.

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If the wheel has a smooth center cap, place the chisel end of the wheel wrench in the slot on the wheel, and gently pry it out.

3. Use the wheel wrench and turn it counterclockwise to loosen the wheel nuts. Do not remove the wheel nuts yet.

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Front Position - 1500 Models

Front Position - All Other Models

4. Position the jack under the vehicle as shown. If the

flat tire is on the front of the vehicle (1500 Model vehicles), position the jack under the bracket attached to the vehicle’s frame, behind the flat tire. If the flat tire is on the front of the vehicle (all other models), position the jack on the frame behind the flat tire.

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{CAUTION:

Getting under a vehicle when it is jacked up is dangerous. If the vehicle slips off the jack, you could be badly injured or killed. Never get under a vehicle when it is supported only by a jack.

{CAUTION:

Raising your vehicle with the jack improperly positioned can damage the vehicle and even make the vehicle fall. To help avoid personal injury and vehicle damage, be sure to fit the jack lift head into the proper location before raising the vehicle.

5. Turn the wheel wrench clockwise to raise the

vehicle. Raise the vehicle far enough off the ground so there is enough room for the spare tire to fit under the wheel well.

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Rear Position – All Models

If the flat tire is on the rear, position the jack under the rear axle between the spring anchor and the shock absorber bracket. If you have added a snow plow to the front of your vehicle, lower the snow plow fully before raising the vehicle. Make sure that the jack head is positioned so that the rear axle is resting securely between the grooves that are on the jack head.

6. Remove all the wheel nuts and take off the flat tire.

7. Remove any rust or dirt

from the wheel bolts, mounting surfaces, and spare wheel.

{CAUTION:

8. Install the spare tire.

{CAUTION:

Rust or dirt on a wheel, or on the parts to which it is fastened, can make wheel nuts become loose after time. The wheel could come off and cause an accident. When you change a wheel, remove any rust or dirt from places where the wheel attaches to the vehicle. In an emergency, you can use a cloth or a paper towel to do this; but be sure to use a scraper or wire brush later, if needed, to get all the rust or dirt off. See Changing a Flat Tire on page 5-94.

Never use oil or grease on studs or nuts. Because the nuts might come loose. The vehicle’s wheel could fall off, causing a crash.

9. Put the wheel nuts back on with the rounded end of

the nuts toward the wheel.

10. Tighten each wheel nut by hand. Then use the wheel wrench to tighten the nuts until the wheel is held against the hub.

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11. Turn the wheel wrench counterclockwise to lower

the vehicle. Lower the jack completely.

{CAUTION:

Incorrect or improperly tightened wheel nuts can cause the wheel to come loose and even come off. This could lead to a crash. If you have to replace them, be sure to get new original equipment wheel nuts. Stop somewhere as soon as you can and have the nuts tightened with a torque wrench to the proper torque specification. See Capacities and Specifications on page 5-133 for wheel nut torque specification.

Improperly tightened wheel nuts can lead

Notice: to brake pulsation and rotor damage. To avoid expensive brake repairs, evenly tighten the wheel nuts in the proper sequence and to the proper torque specification. See Capacities and Specifications on page 5-133 for the wheel nut torque specification.

12. Tighten the nuts firmly in a crisscross sequence as

shown by turning the wheel wrench clockwise.

When you reinstall the regular wheel and tire, you must also reinstall either the center cap, or bolt-on hub cap, depending on what your vehicle is equipped with. For center caps, place the cap on the wheel and tap it into place until it seats flush with the wheel. The cap only goes on one way. Be sure to line up the tab on the center cap with the indentation on the wheel. For bolt-on hub caps, align the plastic nut caps with the wheel nuts and then tighten by hand. Then use the wheel wrench to tighten.

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Secondary Latch System Your vehicle has an underbody-mounted tire hoist assembly equipped with a secondary latch system. It is designed to stop the spare tire from suddenly falling off your vehicle. For the secondary latch to work, the spare must be installed with the valve stem pointing down. See Storing a Flat or Spare Tire and Tools on page 5-110.

{CAUTION:

Before beginning this procedure read all the instructions. Failure to read and follow the instructions could damage the hoist assembly and you and others could get hurt. Read and follow the instructions listed next.

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To release the spare tire from the secondary latch:

1. Check under the

vehicle to see if the cable end is visible. If the cable is not visible proceed to Step 6.

2. If it is visible, first try to tighten the cable by turning the wheel wrench clockwise until you hear two clicks or feel it skip twice. You cannot overtighten the cable.

3. Loosen the cable by turning the wrench

counterclockwise three or four turns.

4. Repeat this procedure at least two times. If the

spare tire lowers to the ground, continue with Step 5 of Removing the Spare Tire and Tools on page 5-95.

5. If the spare does not lower, turn the wrench

counterclockwise until approximately 6 inches (15 cm) of cable is exposed.

6. Stand the wheel blocks on their shortest ends,

with the backs facing each other.

7. Place the bottom edge

of the jack (A) on the wheel blocks (B), separating them so that the jack is balanced securely.

8. Attach the jack handle, extension, and wheel

wrench to the jack and place it (with the wheel blocks) under the vehicle toward the front of the rear bumper.

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11. Continue raising the jack until the spare tire stops

moving upward and is held firmly in place. The secondary latch has released and the spare tire is balancing on the jack.

12. Lower the jack by turning the wheel wrench

counterclockwise. Keep lowering the jack until the spare tire slides off the jack or is hanging by the cable.

{CAUTION:

Someone standing too close during the procedure could be injured by the jack. If the spare tire does not slide off the jack completely, make sure no one is behind you or on either side of you as you pull the jack out from under the spare.

9. Position the center lift point of the jack under the

center of the spare tire.

10. Turn the wrench clockwise to raise the jack until it

lifts the end fitting.

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13. Disconnect the jack handle from the jack and

carefully remove the jack. Use one hand to push against the spare while firmly pulling the jack out from under the spare tire with the other hand. If the spare tire is hanging from the cable, insert the hoist end of extension, and wheel wrench into the hoist shaft hole in the bumper and turn the wheel wrench counterclockwise to lower the spare the rest of the way.

14. Tilt the tire retainer at the end of the cable and pull it through the wheel opening. Pull the tire out from under the vehicle.

15. Turn the wheel wrench in the hoist shaft hole in the bumper clockwise to raise the cable back up if the cable is hanging under the vehicle.

Have the hoist assembly inspected as soon as you can. You will not be able to store a spare or flat tire using the hoist assembly until it has been replaced. To continue changing the flat tire, see Removing the Flat Tire and Installing the Spare Tire on page 5-100.

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Storing a Flat or Spare Tire and Tools

{CAUTION:

Storing a jack, a tire, or other equipment in the passenger compartment of the vehicle could cause injury. In a sudden stop or collision, loose equipment could strike someone. Store all these in the proper place.

Notice: Storing an aluminum wheel with a flat tire under your vehicle for an extended period of time or with the valve stem pointing up can damage the wheel. Always stow the wheel with the valve stem pointing down and have the wheel/tire repaired as soon as possible.

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Store the tire under the rear of the vehicle in the spare tire carrier.

A. Flat or Spare Tire

(Valve Stem Pointed Down) B. Hoist Assembly C. Hoist Cable

D. Tire/Wheel

Retainer

E. Hoist Shaft F. Hoist End of

Extension Tool

G. Hoist Shaft

Access Hole

H. Wheel Wrench

I. Jack Handle

Extensions

J. Spare Tire Lock

(If Equipped)

1. Put the tire on the ground at the rear of the vehicle with the valve stem pointed down, and to the rear.

2. Separate the tire/wheel retainer (D) from the guide

pin. Pull the pin through the center of the wheel. Tilt the retainer down and through the center wheel opening. Make sure the retainer is fully seated across the underside of the wheel.

3. Attach the wheel wrench (H) and extensions (I)

together, as shown.

4. Insert the hoist end (F) through the hole (G) in the rear bumper and onto the hoist shaft. Do not use the chiseled end of the wheel wrench.

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5. Raise the tire part way upward. Make sure the

retainer is seated in the wheel opening.

6. Raise the tire fully against the underside of the vehicle by turning the wheel wrench clockwise until you hear two clicks or feel it skip twice. You cannot overtighten the cable.

To store the jack and jack tools:

A. Wing Nut B. Wheel Blocks C. Retaining Bracket

and Wing Nut

D. Wheel Wrench and

Extensions

E. Tool Bag F. Jack Mounting Bracket G. Jack H. Retaining Bolt

1. Put the tools (D) in the tool bag (E) and place them

in the retaining bracket (C).

2. Tighten down the wing nut (C).

7. Make sure the tire is stored securely. Push, pull (A),

and then try to turn (B) the tire. If the tire moves, use the wheel wrench to tighten the cable.

8. Reinstall the spare tire lock, if the vehicle has one.

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3. Assemble the wheel blocks (B) and jack (G)

together with the wing nut (A) and retaining bolt (H).

4. Position the jack (G) in the mounting bracket (F). Position the holes in the base of the jack (G) onto the pin in the mounting bracket (F).

5. Return them to their original location in the vehicle. For more information, refer to Removing the Spare Tire and Tools on page 5-95 for more information.

Spare Tire Your vehicle, when new, had a fully-inflated spare tire. A spare tire may lose air over time, so check its inflation pressure regularly. See Inflation - Tire Pressure on page 5-76 and Loading Your Vehicle on page 4-36
for information regarding proper tire inflation and loading your vehicle. For instruction on how to remove, install or store a spare tire, see Removing the Flat Tire and Installing the Spare Tire on page 5-100 and Storing a Flat or Spare Tire and Tools on page 5-110. Notice: the different size spare tire is installed on your vehicle, do not drive in four-wheel drive until you can have your flat tire repaired and/or replaced.

If your vehicle has four-wheel drive and

You could damage your vehicle, and the repair costs would not be covered by your warranty. Never use four-wheel drive when the different size spare tire is installed on your vehicle. Your vehicle may have a different size spare tire than the road tires originally installed on your vehicle. This spare tire was developed for use on your vehicle, so it is all right to drive on it. If your vehicle has four-wheel drive and the different size spare tire is installed, keep the vehicle in two-wheel drive. After installing the spare tire on your vehicle, you should stop as soon as possible and make sure the spare tire is correctly inflated. Have the damaged or flat road tire repaired or replaced as soon as you can and installed back onto your vehicle. This way, the spare tire will be available in case you need it again. Do not mix tires and wheels of different sizes, because they will not fit. Keep your spare tire and its wheel together. If your vehicle has a spare tire that does not match your vehicle’s original road tires and wheels in size and type, do not include the spare in the tire rotation.

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Appearance Care

Interior Cleaning Your vehicle’s interior will continue to look its best if it is cleaned often. Although not always visible, dust and dirt can accumulate on your upholstery. Dirt can damage carpet, fabric, leather, and plastic surfaces. Regular vacuuming is recommended to remove particles from your upholstery. It is important to keep your upholstery from becoming and remaining heavily soiled. Soils should be removed as quickly as possible. Your vehicle’s interior may experience extremes of heat that could cause stains to set rapidly. Lighter colored interiors may require more frequent cleaning. Use care because newspapers and garments that transfer color to your home furnishings may also transfer color to your vehicle’s interior.

If you use abrasive cleaners when cleaning

When cleaning your vehicle’s interior, only use cleaners specifically designed for the surfaces being cleaned. Permanent damage may result from using cleaners on surfaces for which they were not intended. Use glass cleaner only on glass. Remove any accidental over-spray from other surfaces immediately. To prevent over-spray, apply cleaner directly to the cleaning cloth. Notice: glass surfaces on your vehicle, you could scratch the glass and/or cause damage to the rear window defogger. When cleaning the glass on your vehicle, use only a soft cloth and glass cleaner. Many cleaners contain solvents that may become concentrated in your vehicle’s breathing space. Before using cleaners, read and adhere to all safety instructions on the label. While cleaning your vehicle’s interior, maintain adequate ventilation by opening your vehicle’s doors and windows. Dust may be removed from small buttons and knobs using a small brush with soft bristles.

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Your dealer/retailer has a product for cleaning your vehicle’s glass. Should it become necessary, you can also obtain a product from your dealer/retailer to remove odors from your vehicle’s upholstery. Do not clean your vehicle using: (cid:127) A knife or any other sharp object to remove a soil

from any interior surface.

(cid:127) A stiff brush. It can cause damage to your vehicle’s

interior surfaces.

(cid:127) Heavy pressure or aggressive rubbing with a

cleaning cloth. Use of heavy pressure can damage your interior and does not improve the effectiveness of soil removal.

(cid:127) Laundry detergents or dishwashing soaps with degreasers can leave residue that streaks and attracts dirt. For liquid cleaners, about 20 drops per gallon (3.78 L) of water is a good guide. Use only mild, neutral-pH soaps.

(cid:127) Too much cleaner that saturates the upholstery. (cid:127) Organic solvents such as naptha, alcohol, etc. that

can damage your vehicle’s interior.

Fabric/Carpet Use a vacuum cleaner with a soft brush attachment frequently to remove dust and loose dirt. A canister vacuum with a beater bar in the nozzle may only be used on floor carpet and carpeted floor mats. For any soil, always try to remove it first with plain water or club soda. Before cleaning, gently remove as much of the soil as possible using one of the following techniques: (cid:127) For liquids: gently blot the remaining soil with a

paper towel. Allow the soil to absorb into the paper towel until no more can be removed.

(cid:127) For solid dry soils: remove as much as possible

and then vacuum.

To clean: 1. Saturate a lint-free, clean white cloth with water or

club soda.

2. Wring the cloth to remove excess moisture. 3. Start on the outside edge of the soil and gently rub toward the center. Continue cleaning, using a clean area of the cloth each time it becomes soiled.

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4. Continue to gently rub the soiled area until the

cleaning cloth remains clean.

5. If the soil is not completely removed, use a mild

soap solution and repeat the cleaning process that was used with plain water.

If any of the soil remains, a commercial fabric cleaner or spot lifter may be necessary. When a commercial upholstery cleaner or spot lifter is to be used, test a small hidden area for colorfastness first. If the locally cleaned area gives any impression that a ring formation may result, clean the entire surface. After the cleaning process has been completed, a paper towel can be used to blot excess moisture from the fabric or carpet.

Leather A soft cloth dampened with water can be used to remove dust. If a more thorough cleaning is necessary, a soft cloth dampened with a mild soap solution can be used. Allow the leather to dry naturally. Do not use heat to dry. Never use steam to clean leather. Never use spot lifters or spot removers on leather. Many commercial leather cleaners and coatings that are sold to preserve and protect leather may permanently change the appearance and feel of your leather and are not recommended. Do not use silicone or wax-based products, or those containing organic solvents to clean your vehicle’s interior because they can alter the appearance by increasing the gloss in a non-uniform manner. Never use shoe polish on leather.

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Instrument Panel, Vinyl, and Other Plastic Surfaces A soft cloth dampened with water may be used to remove dust. If a more thorough cleaning is necessary, a clean soft cloth dampened with a mild soap solution can be used to gently remove dust and dirt. Never use spot lifters or removers on plastic surfaces. Many commercial cleaners and coatings that are sold to preserve and protect soft plastic surfaces may permanently change the appearance and feel of your interior and are not recommended. Do not use silicone or wax-based products, or those containing organic solvents to clean your vehicle’s interior because they can alter the appearance by increasing the gloss in a non-uniform manner. Some commercial products may increase gloss on your instrument panel. The increase in gloss may cause annoying reflections in the windshield and even make it difficult to see through the windshield under certain conditions.

Care of Safety Belts Keep belts clean and dry.

{CAUTION:

Do not bleach or dye safety belts. If you do, it may severely weaken them. In a crash, they might not be able to provide adequate protection. Clean safety belts only with mild soap and lukewarm water.

Weatherstrips Silicone grease on weatherstrips will make them last longer, seal better, and not stick or squeak. Apply silicone grease with a clean cloth. During very cold, damp weather frequent application may be required. See Recommended Fluids and Lubricants on page 6-14.

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Washing Your Vehicle The best way to preserve your vehicle’s finish is to keep it clean by washing it often. Notice: Certain cleaners contain chemicals that can damage the emblems or nameplates on your vehicle. Check the cleaning product label. If it states that it should not be used on plastic parts, do not use it on your vehicle or damage may occur and it would not be covered by the warranty. Do not wash the vehicle in direct sunlight. Use a car washing soap. Do not use cleaning agents that are petroleum based or that contain acid or abrasives, as they can damage the paint, metal or plastic on your vehicle. Approved cleaning products can be obtained from your dealer/retailer. See Vehicle Care/Appearance Materials on page 5-123. Follow all manufacturers’ directions regarding correct product usage, necessary safety precautions and appropriate disposal of any vehicle care product.

Rinse the vehicle well, before washing and after to remove all cleaning agents completely. If they are allowed to dry on the surface, they could stain. Dry the finish with a soft, clean chamois or an all-cotton towel to avoid surface scratches and water spotting. High pressure car washes may cause water to enter the vehicle. Avoid using high pressure washes closer than 12 inches (30 cm) to the surface of the vehicle. Use of power washers exceeding 1,200 psi (8 274 kPa) can result in damage or removal of paint and decals.

Cleaning Exterior Lamps/Lenses Use only lukewarm or cold water, a soft cloth and a car washing soap to clean exterior lamps and lenses. Follow instructions under Washing Your Vehicle on page 5-118.

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Finish Care Occasional waxing or mild polishing of your vehicle by hand may be necessary to remove residue from the paint finish. You can get approved cleaning products from your dealer/retailer. See Vehicle Care/Appearance Materials on page 5-123. If your vehicle has a basecoat/clearcoat paint finish, the clearcoat gives more depth and gloss to the colored basecoat. Always use waxes and polishes that are non-abrasive and made for a basecoat/clearcoat paint finish. Notice: Machine compounding or aggressive polishing on a basecoat/clearcoat paint finish may damage it. Use only non-abrasive waxes and polishes that are made for a basecoat/clearcoat paint finish on your vehicle. Foreign materials such as calcium chloride and other salts, ice melting agents, road oil and tar, tree sap, bird droppings, chemicals from industrial chimneys, etc.,

can damage your vehicle’s finish if they remain on painted surfaces. Wash the vehicle as soon as possible. If necessary, use non-abrasive cleaners that are marked safe for painted surfaces to remove foreign matter. Exterior painted surfaces are subject to aging, weather and chemical fallout that can take their toll over a period of years. You can help to keep the paint finish looking new by keeping your vehicle garaged or covered whenever possible. Protecting Exterior Bright Metal Parts Bright metal parts should be cleaned regularly to keep their luster. Washing with water is all that is usually needed. However, you may use chrome polish on chrome or stainless steel trim, if necessary. Use special care with aluminum trim. To avoid damaging protective trim, never use auto or chrome polish, steam or caustic soap to clean aluminum. A coating of wax, rubbed to high polish, is recommended for all bright metal parts.

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Windshield and Wiper Blades Clean the outside of the windshield with glass cleaner. Clean the rubber blades using a lint free cloth or paper towel soaked with windshield washer fluid or a mild detergent. Wash the windshield thoroughly when cleaning the blades. Bugs, road grime, sap, and a buildup of vehicle wash/wax treatments may cause wiper streaking. Replace the wiper blades if they are worn or damaged. Wipers can be damaged by: (cid:127) Extreme dusty conditions (cid:127) Sand and salt (cid:127) Heat and sun (cid:127) Snow and ice, without proper removal

Aluminum or Chrome-Plated Wheels and Trim Your vehicle may have either aluminum or chrome-plated wheels. Keep the wheels clean using a soft clean cloth with mild soap and water. Rinse with clean water. After rinsing thoroughly, dry with a soft clean towel. A wax may then be applied. Notice: Chrome wheels and other chrome trim may be damaged if you do not wash your vehicle after driving on roads that have been sprayed with magnesium, calcium or sodium chloride. These chlorides are used on roads for conditions such as ice and dust. Always wash your vehicle’s chrome with soap and water after exposure. Notice: abrasive polishes, cleaners, brushes, or cleaners that contain acid on aluminum or chrome-plated wheels, you could damage the surface of the wheel(s). The repairs would not be covered by your warranty. Use only approved cleaners on aluminum or chrome-plated wheels.

If you use strong soaps, chemicals,

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The surface of these wheels is similar to the painted surface of your vehicle. Do not use strong soaps, chemicals, abrasive polishes, abrasive cleaners, cleaners with acid, or abrasive cleaning brushes on them because you could damage the surface. Do not use chrome polish on aluminum wheels. Notice: Using chrome polish on aluminum wheels could damage the wheels. The repairs would not be covered by your warranty. Use chrome polish on chrome wheels only. Use chrome polish only on chrome-plated wheels, but avoid any painted surface of the wheel, and buff off immediately after application. Notice: automatic car wash that has silicone carbide tire cleaning brushes, you could damage the aluminum or chrome-plated wheels. The repairs would not be covered by your warranty. Never drive a vehicle equipped with aluminum or chrome-plated wheels through an automatic car wash that uses silicone carbide tire cleaning brushes.

If you drive your vehicle through an

Tires To clean the tires, use a stiff brush with tire cleaner. Notice: Using petroleum-based tire dressing products on your vehicle may damage the paint finish and/or tires. When applying a tire dressing, always wipe off any overspray from all painted surfaces on your vehicle.

Sheet Metal Damage If the vehicle is damaged and requires sheet metal repair or replacement, make sure the body repair shop applies anti-corrosion material to parts repaired or replaced to restore corrosion protection. Original manufacturer replacement parts will provide the corrosion protection while maintaining the warranty.

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Finish Damage Any stone chips, fractures or deep scratches in the finish should be repaired right away. Bare metal will corrode quickly and may develop into major repair expense. Minor chips and scratches can be repaired with touch-up materials available from your dealer/retailer. Larger areas of finish damage can be corrected in your dealer’s/retailer’s body and paint shop.

Underbody Maintenance Chemicals used for ice and snow removal and dust control can collect on the underbody. If these are not removed, corrosion and rust can develop on the underbody parts such as fuel lines, frame, floor pan, and exhaust system even though they have corrosion protection.

At least every spring, flush these materials from the underbody with plain water. Clean any areas where mud and debris can collect. Dirt packed in close areas of the frame should be loosened before being flushed. Your dealer/retailer or an underbody car washing system can do this for you.

Chemical Paint Spotting Some weather and atmospheric conditions can create a chemical fallout. Airborne pollutants can fall upon and attack painted surfaces on the vehicle. This damage can take two forms: blotchy, ring-shaped discolorations, and small, irregular dark spots etched into the paint surface. Although no defect in the paint job causes this, we will repair, at no charge to the owner, the surfaces of new vehicles damaged by this fallout condition within 12 months or 12,000 miles (20 000 km) of purchase, whichever occurs first.

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Vehicle Care/Appearance Materials

Description

Usage

Description

Usage

Swirl Remover Polish

Polishing Cloth

Tar and Road Oil Remover Chrome Cleaner and Polish

White Sidewall Tire Cleaner

Vinyl Cleaner

Glass Cleaner

Chrome Wheel Cleaner

Finish Enhancer

Interior and exterior polishing cloth. Removes tar, road oil, and asphalt. Use on chrome or stainless steel. Removes soil and black marks from whitewalls and raised white lettering. Cleans vinyl. Removes dirt, grime, smoke and fingerprints. Removes dirt and grime from chrome wheels. Removes dust, fingerprints, and surface contaminants. Spray on and wipe off.

Cleaner Wax

Foaming Tire Shine Low Gloss

Wash Wax Concentrate

Spot Lifter

Odor Eliminator

Removes swirl marks, fine scratches, and other light surface contamination. Removes light scratches and protects finish. Cleans, shines, and protects tires. No wiping necessary. Medium foaming shampoo. Cleans and lightly waxes. Biodegradable and phosphate free. Quickly removes spots and stains from carpets, vinyl, and cloth upholstery. Odorless spray odor eliminator used on fabrics, vinyl, leather and carpet.

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Vehicle Identification

Vehicle Identification Number (VIN)

This is the legal identifier for your vehicle. It appears on a plate in the front corner of the instrument panel, on the driver side. It can be seen through the windshield from outside the vehicle. The VIN also appears on the Certification/Tire and Service Parts labels and the certificates of title and registration.

Engine Identification The eighth character in the VIN is the engine code. This code helps identify the vehicle’s engine, specifications, and replacement parts. See “Engine Specifications” under Capacities and Specifications on page 5-133 for your vehicle’s engine code.

Service Parts Identification Label This label is on the inside of the glove box. It is very helpful if you ever need to order parts. The label has the following information: (cid:127) Vehicle Identification Number (VIN) (cid:127) Model designation (cid:127) Paint information (cid:127) Production options and special equipment Do not remove this label from the vehicle.

5-124

Electrical System

Add-On Electrical Equipment Notice: Do not add anything electrical to your vehicle unless you check with your dealer/retailer first. Some electrical equipment can damage your vehicle and the damage would not be covered by your warranty. Some add-on electrical equipment can keep other components from working as they should. Add-on equipment can drain your vehicle’s battery, even if your vehicle is not operating. Your vehicle has an airbag system. Before attempting to add anything electrical to your vehicle, see Servicing Your Airbag-Equipped Vehicle on page 1-86.

Windshield Wiper Fuses The windshield wiper motor is protected by an internal circuit breaker and a fuse. If the motor overheats due to heavy snow, etc., the wiper will stop until the motor cools. If the overload is caused by some electrical problem and not snow, etc., be sure to get it fixed.

Power Windows and Other Power Options Circuit breakers protect the power windows and other power accessories. If the current load is too heavy, the circuit breaker opens and then closes after a cool down period, protecting the circuit until the problem is fixed or goes away.

Fuses and Circuit Breakers The wiring circuits in your vehicle are protected from short circuits by a combination of fuses, circuit breakers and fusible thermal links. This greatly reduces the chance of fires caused by electrical problems. Look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse. Be sure you replace a bad fuse with a new one of the identical size and rating. Fuses of the same amperage can be temporarily borrowed from another fuse location, if a fuse goes out. Replace the fuse as soon as you can.

5-125

Instrument Panel Fuse Block

The instrument panel fuse block access door is located on the driver side edge of the instrument panel.

Pull off the cover to access the fuse block.

5-126

Fuses

Usage

Rear Seats Rear Accessory Power Outlet Steering Wheel Controls Backlight Driver Door Module Dome Lamps, Driver Side Turn Signal Driver Side Turn Signal, Stoplamp

Fuses

Usage

Fuses

Usage

10
11

12

13
14
15
16
17
18
19
20
21

Instrument Panel Back Lighting Passenger Side Turn Signal, Stoplamp Universal Home Remote Power Door Lock 2 (Unlock Feature) Power Door Lock 2 (Lock Feature) Stoplamps, Center-High Mounted Stoplamp Rear Climate Controls Power Mirror Body Control Module (BCM) Accessory Power Outlets Interior Lamps Power Door Lock 1 (Unlock Feature) Rear Seat Entertainment Ultrasonic Rear Parking Assist Power Door Lock 1 (Lock Feature)

22
23
24

25

26

Driver Information Center (DIC) Not Used Not Used Driver Seat Module, Remote Keyless Entry System Driver Power Door Lock (Unlock Feature)

Circuit Breaker

Usage

LT DR

Driver Side Power Window Circuit Breaker

Harness Connector

LT DR BODY BODY

Usage

Driver Door Harness Connection Harness Connector Harness Connector

5-127

Center Instrument Panel Fuse Block The center instrument panel fuse block is located underneath the instrument panel, to the left of the steering column. Top View

Harness Connector

Usage

BODY 3

Body Harness Connector 3

HEADLINER 3 Headliner Harness Connector 3
HEADLINER 2 Headliner Harness Connector 2
HEADLINER 1 Headliner Harness Connector 1
SEO/UPFITTER Special Equipment Option Upfitter

Harness Connector

Circuit Breaker

Usage

CB1

CB2
CB3
CB4

Passenger Side Power Window Circuit Breaker Passenger Seat Circuit Breaker Driver Seat Circuit Breaker Rear Sliding Window

Harness Connector

BODY 2
BODY 1

Usage

Body Harness Connector 2
Body Harness Connector 1

5-128

Underhood Fuse Block If your vehicle has the DURAMAX® Diesel engine, see the DURAMAX® Diesel manual for more information. The underhood fuse block is located in the engine compartment, on the driver side of the vehicle.

Lift the cover to access the fuse block. Notice: Spilling liquid on any electrical components on your vehicle may damage it. Always keep the covers on any electrical component. To remove fuses, hold the end of the fuse between your thumb and index finger and pull straight out.

Fuses

Usage

Right Trailer Stop/Turn Lamp Electronic Suspension Control, Automatic Level Control Exhaust Left Trailer Stop/Turn Lamp Engine Controls Engine Control Module, Throttle Control

5-129

Fuses

Usage

Fuses

Usage

10
11
12

13

14

15

16

17
18
19
20
21

Trailer Brake Controller Front Washer Oxygen Sensor Antilock Brakes System 2
Trailer Back-up Lamps Driver Side Low-Beam Headlamp Engine Control Module (Battery) Fuel Injectors, Ignition Coils (Right Side) Transmission Control Module (Battery) Vehicle Back-up Lamps Passenger Side Low-Beam Headlamp Air Conditioning Compressor Oxygen Sensors Transmission Controls (Ignition) Fuel Pump Fuel System Control Module

22
23

24

25
26
27
28
29

30

31
32
33
34

35

36
37

Not Used Not Used Fuel Injectors, Ignition Coils (Left Side) Trailer Park Lamps Driver Side Park Lamps Passenger Side Park Lamps Fog Lamps Horn Passenger Side High-Beam Headlamp Daytime Running Lamps Driver Side High-Beam Headlamp Daytime Running Lights 2
Sunroof Key Ignition System, Theft Deterrent System Windshield Wiper SEO B2 Upfitter Usage (Battery)

5-130

Fuses

Usage

Fuses

Usage

38
39
40
41
42

43

44
45
46
47

48

49

50
51
52

Electric Adjustable Pedals Climate Controls (Battery) Airbag System (Ignition) Amplifier Audio System Miscellaneous (Ignition), Cruise Control Not Used Airbag System (Battery) Instrument Panel Cluster Power Take-Off Auxiliary Climate Control (Ignition), Compass-Temperature Mirror Center High-Mounted Stoplamp (CHMSL) Rear Defogger Heated Mirrors SEO B1 Upfitter Usage (Battery)

53

54

55

56

Cigarette Lighter, Auxiliary Power Outlet Automatic Level Control Compressor Relay, SEO Upfitter Usage Climate Controls (Ignition) Engine Control Module, Secondary Fuel Pump (Ignition)

J-Case Fuses

Usage

57
58
59
60
61
62
63
64
65

Cooling Fan 1
Not Used Heavy Duty Antilock Brake System Cooling Fan 2
Antilock Brake System 1
Starter Stud 2 (Trailer Brakes) Left Bussed Electrical Center 1
Not Used

5-131

J-Case Fuses

Usage

Relays

Usage

66
67

68

69
70
72
73

Heated Windshield Washer System Four-Wheel Drive System Stud 1 (Trailer Connector Battery Power) (Optional - 40A Fuse Required) Mid-Bussed Electrical Center 1
Climate Control Blower Not Used Left Bussed Electrical Center 2

Cooling Fan High Speed FAN HI Cooling Fan Low Speed FAN LO Cooling Fan Control FAN CNTRL Low-Beam Headlamp HDLP LO/HID Front Fog Lamps FOG LAMP Air Conditioning Compressor A/C CMPRSR Starter STRTR Powertrain PWR/TRN Fuel Pump FUEL PMP PRK LAMP Parking Lamps REAR DEFOG Rear Defogger RUN/CRANK

Switched Power

5-132

Capacities and Specifications The following approximate capacities are given in English and metric conversions. See Recommended Fluids and Lubricants on page 6-14 for more information. If your vehicle has the DURAMAX® Diesel engine, see the DURAMAX® Diesel manual for more information.

Application

Capacities

English

Metric

Air Conditioning Refrigerant R134a

Cooling System

4.3L V6
4.8L V8
5.3L V8
6.0L V8 1500 Series 6.0L V8 2500, 3500 Series

Engine Oil with Filter

4.3L V6
4.8L V8; 5.3L V8; 6.0L V8

For the air conditioning system refrigerant charge amount, see the refrigerant caution label located

under the hood. See your dealer for more

information.

16.5 qt 16.9 qt 16.9 qt 16.8 qt 16.4 qt

4.5 qt 6.0 qt

15.6 L 16.0 L 16.0 L 15.9 L 15.5 L

4.3 L 5.7 L

5-133

Application

Fuel Tank

1500 Series Standard and Short Box 1500 Series Long Box 2500 Series Standard Box 2500 Series and 3500 Series Long Box 3500 Series Chassis Cab 3500 Chassis Cab – Front Tank 3500 Chassis Cab – Rear Tank

Transmission Fluid (Pan Removal and Filter Replacement)

Auto 4-Speed Transmission 4L60-E Electronic Transmission Auto 4-Speed Transmission 4L70-E Super Duty Transmission Auto 6-Speed Transmission 6L80-E Auto 6-Speed Transmission 6L90-E Auto 6-Speed Transmission Allison

Capacities

English

26.0 gal 34.0 gal 26.0 gal 34.0 gal 50.0 gal 27.0 gal

23.0 gal (if equipped)

Metric

98.0 L 128.7 L 98.0 L 128.7 L 189.0 L 102.0 L 87.0 L

5.0 qt 5.0 qt 6.0 qt 6.3 qt 7.4 qt 1.6 qt 140 ft lb

4.7 L 4.7 L 5.7 L 6.0 L 7.0 L 1.5 L 190 Y

Transfer Case Fluid Wheel Nut Torque After refill, the level must be rechecked. Add enough engine coolant so that the fluid is within the proper operating range.

5-134

Engine Specifications

VIN Code

Transmission

Engine 4.3L V6
4.8L V8

5.3L V8 Flexible Fuel with Active Fuel Management™

(Iron Block)

5.3L V8 Flexible Fuel with Active Fuel Management™

(Aluminum Block) 5.3L V8 with Active Fuel Management™

(Aluminum Block)

5.3L V8 with Active Fuel

Management™ (Iron Block)

6.0L V8 (Iron Block) 6.0L V8 with Active Fuel Management™

(Aluminum Block)

Automatic Automatic

Automatic

Spark Plug Gap 0.060 in (1.52 mm) 0.040 in (1.01 mm)

0.040 in (1.01 mm)

Automatic

0.040 in (1.01 mm)

Automatic

0.040 in (1.01 mm)

Automatic

Automatic

Automatic

0.040 in (1.01 mm)

0.040 in (1.01 mm)

0.040 in (1.01 mm)

5-135

✍ NOTES

5-136

Section 6

Maintenance Schedule

Maintenance Schedule ......................................6-2
Introduction ...................................................6-2
Maintenance Requirements ..............................6-2
Your Vehicle and the Environment ....................6-2
Using the Maintenance Schedule ......................6-2
Scheduled Maintenance (Gasoline Engine) .........6-4
Additional Required Services ............................6-6
Maintenance Footnotes (Gasoline Engine) ..........6-8
Owner Checks and Services ..........................6-10

At the First 100, 1,000 and 6,000 Miles

(160, 1 600 and 10 000 km) .......................6-10
At Each Fuel Fill ..........................................6-10
At Least Once a Month .................................6-11
At Least Once a Year ...................................6-12
Recommended Fluids and Lubricants ...............6-14
Maintenance Replacement Parts .....................6-16
Engine Drive Belt Routing ..............................6-17
Maintenance Record .....................................6-18

6-1

Maintenance Schedule

Introduction This maintenance section applies to vehicles with a gasoline engine. If your vehicle has a diesel engine, see the maintenance schedule section in the DURAMAX Diesel manual. Important: Keep engine oil at the proper level and change as recommended.

Have you purchased the GM Protection Plan? The Plan supplements your new vehicle warranties. See your Warranty and Owner Assistance booklet or your dealer/ retailer for details.

6-2

Maintenance Requirements Notice: Maintenance intervals, checks, inspections, replacement parts, and recommended fluids and lubricants as prescribed in this manual are necessary to keep your vehicle in good working condition. Any damage caused by failure to follow scheduled maintenance might not be covered by warranty.

Your Vehicle and the Environment Proper vehicle maintenance not only helps to keep your vehicle in good working condition, but also helps the environment. All recommended maintenance is important. Improper vehicle maintenance can even affect the quality of the air we breathe. Improper fluid levels or the wrong tire inflation can increase the level of emissions from your vehicle. To help protect our environment, and to keep your vehicle in good condition, be sure to maintain your vehicle properly.

Using the Maintenance Schedule We want to help you keep your vehicle in good working condition. But we do not know exactly how you will drive it. You might drive very short distances only a few times a week. Or you might drive long distances all the time in very hot, dusty weather. You might use your vehicle in making deliveries. Or you might drive it to work, to do errands, or in many other ways.

Because of all the different ways people use their vehicles, maintenance needs vary. You might need more frequent checks and replacements. So please read the following and note how you drive. If you have any questions on how to keep your vehicle in good condition, see your dealer/retailer. This schedule is for vehicles that: (cid:127) carry passengers and cargo within recommended

limits. You will find these limits on the Tire and Loading Information label. See Loading Your Vehicle on page 4-36.

(cid:127) are driven on reasonable road surfaces within legal

driving limits.

(cid:127) are driven off-road in the recommended manner.

See Off-Road Driving on page 4-12.

(cid:127) use the recommended fuel. See Gasoline Octane

on page 5-6.

The services in Scheduled Maintenance (Gasoline Engine) on page 6-4 should be performed when indicated. See Additional Required Services on page 6-6
and Maintenance Footnotes (Gasoline Engine) on page 6-8 for further information.

{CAUTION:

Performing maintenance work on a vehicle can be dangerous. In trying to do some jobs, you can be seriously injured. Do your own maintenance work only if you have the required know-how and the proper tools and equipment for the job. If you have any doubt, see your dealer/retailer to have a qualified technician do the work. See Doing Your Own Service Work on page 5-5.

Some maintenance services can be complex. So, unless you are technically qualified and have the necessary equipment, you should have your dealer/retailer do these jobs. When you go to your dealer/retailer for your service needs, you will know that trained and supported service technicians will perform the work using genuine parts. If you want to purchase service information, see Service Publications Ordering Information on page 7-15. Owner Checks and Services on page 6-10 tells you what should be checked, when to check it, and what you can easily do to help keep your vehicle in good condition.

6-3

The proper replacement parts, fluids, and lubricants to use are listed in Recommended Fluids and Lubricants on page 6-14 and Maintenance Replacement Parts on page 6-16. When your vehicle is serviced, make sure these are used. All parts should be replaced and all necessary repairs done before you or anyone else drives the vehicle. We recommend the use of genuine parts from your dealer/retailer.

Scheduled Maintenance (Gasoline Engine) This maintenance section applies to vehicles with a gasoline engine. If your vehicle has a diesel engine, see the maintenance schedule section in the DURAMAX® Diesel manual. When the CHANGE ENGINE OIL SOON message comes on, it means that service is required for your vehicle. Have your vehicle serviced as soon as possible within the next 600 miles (1 000 km). It is possible that, if you are driving under the best conditions, the engine oil life system may not indicate that vehicle service is necessary for over a year. However, your engine oil and filter must be changed at least once a year and at this time the system must be reset. Your dealer/retailer has trained service technicians who will perform this work using genuine parts and reset the system.

6-4

If the engine oil life system is ever reset accidentally, you must service your vehicle within 3,000 miles (5 000 km) since your last service. Remember to reset the oil life system whenever the oil is changed. See Engine Oil Life System on page 5-18 for information on the Engine Oil Life System and resetting the system. When the CHANGE ENGINE OIL SOON message appears, certain services, checks, and inspections are required. Required services are described in the following for “Maintenance I” and “Maintenance II.” Generally, it is recommended that your first service be Maintenance I, your second service be Maintenance II, and that you alternate Maintenance I and Maintenance II thereafter. However, in some cases, Maintenance II may be required more often. Maintenance I — Use Maintenance I if the CHANGE ENGINE OIL SOON message comes on within 10 months since the vehicle was purchased or Maintenance II was performed. Maintenance II — Use Maintenance II if the previous service performed was Maintenance I. Always use Maintenance II whenever the message comes on 10 months or more since the last service or if the message has not come on at all for one year.

Scheduled Maintenance

Service

Maintenance I Maintenance II

Change engine oil and filter. See Engine Oil (Gasoline Engine) on page 5-15. Reset oil life system. See Engine Oil Life System on page 5-18. An Emission Control Service. Allison Transmission® only: Replace external transmission filter at the first maintenance service performed on the vehicle. Lubricate chassis components. See footnote #. Visually check for any leaks or damage. See footnote (j). Inspect engine air cleaner filter or change indicator (if equipped). If necessary, replace filter. See Engine Air Cleaner/Filter (Gasoline Engines) on page 5-20. See footnote (p). Rotate tires and check inflation pressures and wear. See Tire Inspection and Rotation on page 5-83 and “Tire Wear Inspection” in At Least Once a Month on page 6-11. Inspect brake system. See footnote (a). Check engine coolant and windshield washer fluid levels and add fluid as needed. Perform any needed additional services. See “Additional Required Services” in this section. Inspect suspension and steering components. See footnote (b). Inspect engine cooling system. See footnote (c). Inspect wiper blades. See footnote (d). Inspect restraint system components. See footnote (e). Lubricate body components. See footnote (f).

•

• •

•

• •

•

•

• •

•

•

• •

•

• • • • •

6-5

Scheduled Maintenance (cont’d) Service

Check transmission fluid level and add fluid as needed. Inspect shields, vehicles with diesel engine or with GVWR above 10,000 lbs (4 536 kg) only. See footnote (n).

Maintenance I Maintenance II

•

•

Additional Required Services This maintenance section applies to vehicles with a gasoline engine. If your vehicle has a diesel engine, see the maintenance schedule section in the DURAMAX® Diesel manual.

The following services should be performed at the first maintenance service (I or II) after the indicated miles (kilometers) shown for each item.

Service and Miles (Kilometers)

Additional Required Services 75,000

25,000
(40 000)

50,000
(80 000)

(120 000)

100,000
(160 000)

125,000
(200 000)

150,000
(240 000)

•

•

Inspect fuel system for damage or leaks. Inspect exhaust system for loose or damaged components. Vehicles without a filter restriction indicator: Replace engine air cleaner filter. See Engine Air Cleaner/Filter (Gasoline Engines) on page 5-20. Change automatic transmission fluid and filter (severe service). See footnote (h).

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

6-6

Additional Required Services (cont’d)

Service and Miles (Kilometers)

Change automatic transmission fluid and filter (normal service). Four-wheel drive only: Change transfer case fluid (extreme duty service). See footnotes (g) and (l). Four-wheel drive only: Change transfer case fluid (severe service). See footnotes (g) and (m). Four-wheel drive only: Change transfer case fluid (normal service). See footnote (g). Inspect evaporative control system. An Emission Control Service. See footnotes † and (k). Replace spark plugs and inspect spark plug wires. An Emission Control Service. Engine cooling system service (or every five years, whichever occurs first). An Emission Control Service. See footnote (i). Inspect engine accessory drive belt. An Emission Control Service. See footnote (q).

25,000
(40 000)

50,000
(80 000)

75,000

(120 000)

100,000
(160 000)

125,000
(200 000)

150,000
(240 000)

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

6-7

Maintenance Footnotes (Gasoline Engine) This maintenance section applies to vehicles with a gasoline engine. If your vehicle has a diesel engine, see the maintenance schedule section in the DURAMAX® Diesel manual. † The U.S. Environmental Protection Agency or the California Air Resources Board has determined that the failure to perform this maintenance item will not nullify the emission warranty or limit recall liability prior to the completion of the vehicle’s useful life. We, however, urge that all recommended maintenance services be performed at the indicated intervals and the maintenance be recorded. # Lubricate the front suspension, steering linkage, and parking brake cable guides. Control arm ball joints on 2500/3500 series vehicles require lubrication but should not be lubricated unless their temperature is 10°F (−12°C) or higher, or they could be damaged. Control arm ball joints on 1500 series vehicles are maintenance-free. Vehicles used under severe commercial operating conditions require lubrication on a regular basis every 3,000 miles (5 000 km).

(a) Visually inspect brake lines and hoses for proper hook-up, binding, leaks, cracks, chafing, etc. Inspect disc brake pads for wear and rotors for surface condition. Inspect drum brake linings/shoes for wear or cracks. Inspect other brake parts, including drums, wheel cylinders, calipers, parking brake, etc. (b) Visually inspect front and rear suspension and steering system for damaged, loose or missing parts, signs of wear or lack of lubrication. Inspect power steering lines and hoses for proper hook-up, binding, leaks, cracks, chafing, etc. Visually check constant velocity joints, rubber boots, and axle seals for leaks. (c) Visually inspect hoses and have them replaced if they are cracked, swollen, or deteriorated. Inspect all pipes, fittings and clamps; replace with genuine parts as needed. To help ensure proper operation, a pressure test of the cooling system and pressure cap and cleaning the outside of the radiator and air conditioning condenser is recommended at least once a year. (d) Inspect wiper blades for wear, cracking, or contamination. Clean the windshield and wiper blades, if contaminated. Replace wiper blades that are worn or damaged. See Windshield Wiper Blade Replacement on page 5-67 and Windshield and Wiper Blades on page 5-120 for more information.

6-8

(e) Make sure the safety belt reminder light and safety belt assemblies are working properly. Look for any other loose or damaged safety belt system parts. If you see anything that might keep a safety belt system from doing its job, have it repaired. Have any torn or frayed safety belts replaced. Also see Checking the Restraint Systems on page 1-88. (f) Lubricate all key lock cylinders, body door hinges, hood latch assembly, secondary latch, pivots, spring anchor, release pawl, tailgate hinges, tailgate linkage, tailgate handle pivot points, latch bolt, fuel door hinge, locks, and folding seat hardware. More frequent lubrication may be required when exposed to a corrosive environment. Applying silicone grease on weatherstrips with a clean cloth will make them last longer, seal better, and not stick or squeak. (g) Check vent hose at transfer case for kinks and proper installation. Check to be sure vent hose is unobstructed, clear, and free of debris. During any maintenance, if a power washer is used to clean mud and dirt from the underbody, care should be taken to not directly spray the transfer case output seals. High pressure water can overcome the seals and contaminate the transfer case fluid. Contaminated fluid will decrease the life of the transfer case and should be replaced.

(h) Change automatic transmission fluid and filter if the vehicle Gross Vehicle Weight Rating (GVWR) is over 8600 lbs or if the vehicle is mainly driven under one or more of these conditions:

− In heavy city traffic where the outside temperature

regularly reaches 90°F (32°C) or higher.

− In hilly or mountainous terrain. − When doing frequent trailer towing. − Uses such as found in taxi, police or delivery

service.

(i) Drain, flush, and refill cooling system. This service can be complex; you should have your dealer/retailer perform this service. See Engine Coolant on page 5-29
for what to use. Inspect hoses. Clean radiator, condenser, pressure cap, and filler neck. Pressure test the cooling system and pressure cap. (j) A fluid loss in any vehicle system could indicate a problem. Have the system inspected and repaired and the fluid level checked. Add fluid if needed. (k) Inspect system. Check all fuel and vapor lines and hoses for proper hook-up, routing, and condition. Check that the purge valve, if the vehicle has one, works properly. Replace as needed.

6-9

(l) Extreme Duty Service: Change transfer case fluid if the vehicle is mainly driven off-road in four-wheel drive, or is used for heavy trailer towing. Farming, mining, forestry, and Department of Natural Resources (DNR) vehicles meet this definition. (m) Severe Service: Change transfer case fluid if the vehicle is mainly used for trailer towing or driven in city traffic, wet environment, or high ambient temperatures. (n) Vehicles with diesel engine or with GVWR above 10,000 lbs (4 536 kg) only: Inspect shields for damage or looseness. Adjust or replace as required. This is a Noise Emission Control Service. Applicable to vehicles sold in the United States and recommended for vehicles sold in Canada. (p) If you drive regularly under dusty conditions, inspect the filter or change indicator (if equipped) at each engine oil change. (q) Visually inspect belt for fraying, excessive cracks, or obvious damage. Replace belt if necessary.

Owner Checks and Services These owner checks and services should be performed at the intervals specified to help ensure the safety, dependability, and emission control performance of your vehicle. Your dealer/retailer can assist you with these checks and services. Be sure any necessary repairs are completed at once. Whenever any fluids or lubricants are added to your vehicle, make sure they are the proper ones, as shown in Recommended Fluids and Lubricants on page 6-14.

At the First 100, 1,000 and 6,000
Miles (160, 1 600 and 10 000 km) For vehicles with dual wheels, check dual wheel nut torque. For proper torque, see Capacities and Specifications on page 5-133.

At Each Fuel Fill It is important to perform these underhood checks at each fuel fill.

6-10

It is important to check the engine oil

Engine Oil Level Check Notice: regularly and keep it at the proper level. Failure to keep the engine oil at the proper level can cause damage to the engine not covered by your warranty. Check the engine oil level and add the proper oil if necessary. See Engine Oil (Gasoline Engine) on page 5-15. Engine Coolant Level Check Check the engine coolant level and add DEX-COOL® coolant mixture if necessary. See Engine Coolant on page 5-29. Windshield Washer Fluid Level Check Check the windshield washer fluid level in the windshield