2003 GMC Sierra Owners Manual

If you ever replace your tires with those not having a TPC Spec number, make sure they are the same size, load range, speed rating and construction type (bias, bias-belted or radial) as your original tires.

Mixing tires could cause you to lose control while driving. If you mix tires of different sizes or types (radial and bias-belted tires), you could have a crash. Using tires of different sizes may also cause damage to your vehicle. Be sure to use the same size and type tires on all wheels.

If you use bias-ply tires on your vehicle, the wheel rim flanges could develop cracks after many miles of driving. A tire and/or wheel could fail suddenly, causing a crash. Use only radial-ply tires with the wheels on your vehicle.

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Uniform Tire Quality Grading Quality grades can be found where applicable on the tire sidewall between tread shoulder and maximum section width. For example: Treadwear 200 Traction AA Temperature A The following information relates to the system developed by the United States National Highway Traffic Safety Administration, which grades tires by treadwear, traction and temperature performance. (This applies only to vehicles sold in the United States.) The grades are molded on the sidewalls of most passenger car tires. The Uniform Tire Quality Grading system does not apply to deep tread, winter-type snow tires, space-saver or temporary use spare tires, tires with nominal rim diameters of 10 to 12 inches (25 to 30 cm), or to some limited-production tires. While the tires available on General Motors passenger cars and light trucks may vary with respect to these grades, they must also conform to federal safety requirements and additional General Motors Tire Performance Criteria (TPC) standards.

Treadwear The treadwear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions on a specified government test course. For example, a tire graded 150 would wear one and a half (1.5) times as well on the government course as a tire graded 100. The relative performance of tires depends upon the actual conditions of their use, however, and may depart significantly from the norm due to variations in driving habits, service practices and differences in road characteristics and climate. Traction - AA, A, B, C The traction grades, from highest to lowest, are AA, A, B, and C. Those grades represent the tire’s ability to stop on wet pavement as measured under controlled conditions on specified government test surfaces of asphalt and concrete. A tire marked C may have poor traction performance. Warning: The traction grade assigned to this tire is based on straight-ahead braking traction tests, and does not inch e acceleration,

cornering, hydroplaning, or peak 4 raction characteristics.

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Temperature - A, B, C The temperature grades are A (the highest), B, and C, representing the tire’s resistance to the generation of heat and its ability to dissipate heat when tested under controlled conditions on a specified indoor laboratory test wheel. Sustained high temperature can cause the material of the tire to degenerate and reduce tire life, and excessive temperature can lead to sudden tire failure. The grade C corresponds to a level of performance which all passenger car tires must meet under the Federal Motor Vehicle Safety Standard No. 109. Grades B and A represent higher levels of performance on the laboratory test wheel than the minimum required by law. Warning: The temperature grade for this tire is established for a tire that is properly inflated and not overloaded. Excessive speed, underinflation, or excessive loading, either separately or in combination, can cause heat buildup and possible tire failure.

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Wheel Alignment and Tire Balance The wheels on your vehicle were aligned and balanced carefully at the factory to give you the longest tire life and best overall performance. Scheduled wheel alignment and wheel balancing are not needed. However, if you notice unusual tire wear or your vehicle pulling one way or the other, the alignment may need to be reset. If you notice your vehicle vibrating when driving on a smooth road, your wheels may need to be rebalanced. Wheel Replacement Replace any wheel that is bent, cracked, or badly rusted or corroded. If wheel nuts keep coming loose, the wheel, wheel bolts and wheel nuts should be replaced. If the wheel leaks air, replace it (except some aluminum wheels, which can sometimes be repaired). See your dealer if any of these conditions exist. Your dealer will know the kind of wheel you need. Each new wheel should have the same load-carrying capacity, diameter, width, offset and be mounted the same way as the one it replaces. If you need to replace any of your wheels, wheel bolts or wheel nuts, replace them only with new GM original equipment parts. This way, you will be sure to have the right wheel, wheel bolts and wheel nuts for your vehicle.

Used Replacement ya’cleels

Using the wrong replacement wheels, --.reel bolts or wheel nuts on your vehicle can be dangerous. It could affect the braking and handling of your vehicle, make your tires lose air and make you lose control. You could have a collision in which you or others could be injured. Always use the correct wheel, wheel bolts and wheel nuts for replacement.

Putting a used wheel on your vehicle is dangerous. You can’t know how it’s been used or how far it’s been driven. It could fail suddenly and cause a crash. If you have to replace a wheel, use a new GM original equipment wheel.

Notice: The wrong wheel can also cause problems with bearing life, brake cooling, speedometer or odometer calibration, headlamp aim, bumper height, vehicle ground clearance and tire or tire chain clearance to the body and chassis. Whenever a wheel, wheel bolt or wheel nut is replaced on a dual wheel setup, check the wheel nut torque after 100, 1,000 and 6,000 miles (1 60, 1 600 and 10 000 km) of driving. For proper torque, see “Wheel Nut Torque” in the Index. See “Changing a Flat Tire” in the Index for more information.

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Nofice: If your vehicle does not have dual wheels and is equipped with a tire size other than P265R5R16, or LT65D5R16, use tire chains only where legal and only when you must. Use chains that are the proper size for your tires. Install them on the tires of the rear axle. Don’t use chains on the tires of the front axle. Tighten them as tightly as possible with the ends securely fastened. Drive slowly and follow the chain manufacturer’s instructions. If you can hear the chains contacting your vehicle, stop and retighten them. If the contact continues, slow down until it stops. Driving too fast or spinning the wheels with chains on will damage your vehicle.

Tire Chains

If your vehicle has dual wheels or P265/75R16 or LT265n5R16 size tires, don’t use tire chains. They can damage your vehicle because there’s not enough clearance. Tire chains used on a vehicle without the proper amount of clearance can cause damage to the brakes, suspension or other vehicle parts. The area damaged by the tire chains could cause you to lose control of your vehicle and you or others may be injured in a crash. Use another type of traction device only if its manufacturer recommends it for use on your vehicle and tire size combination and road conditions. Follow that manufacturer’s instructions. To help avoid damage to yourvehicle, drive slowly, readjust or remove the device if it’s contacting your vehicle, and don’t spin your wheels. If you do find traction devices that will fit, install them on the rear tires.”

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If a Tire Goes Flat It’s unusual for a tire to “blow out” while you’re driving, especially if you maintain your tires properly. If air goes out of a tire, it’s much more likely to leak out slowly. But if you should ever have a “blowout”, here are a few tips about what to expect and what to do: If a front tire fails, the flat tire will create a drag that pulls the vehicle toward that side. Take your foot off the accelerator pedal and grip the steering wheel firmly. Steer to maintain lane position, and then gently brake to a stop well out of the traffic lane.

A rear blowout, particularly on a curve, acts much like a skid and may require the same correction you’d 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. Gentiy brake to a stop - well off the road if possible. If a tire goes flat, the next part shows how to use your jacking equipment to change a flat tire safely.

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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.

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

Changing a tire can cause an injury. The vehicle can slip off the jack and roll over you or other people. You and they could be badly injured. 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. 5. Put the wheel 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 of the vehicle, at the opposite end.

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Removing the Spare Tire and Tools

Regular Cab

Extended and Crew Cab@

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The equipment you’ll need is behind the passenger’s seat. For Extended and Crew Cab@ models, the equipment is under the passenger’s side second row seat. 1. If there is a cover, move the seats forward and turn

the wing nut on the cover counterclockwise to remove it. For Crew Cab@ models, pull up the second row seat with the loop at the base of the seat cushion to access the tools.

2. The wheel blocks and the wheel block retainer can

be removed by turning the wing nut counterclockwise.

3. To release the bottle jack from its holder, turn the knob on the bottle jack counterclockwise to lower the jack head.

4. There is also a wing nut used to retain the storage

bag and tools. To remove it, turn the wing nut counterclockwise.

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

A. Hoist Assembly B. Wheel Wrench C. Extensions D. Hoist Shaft E. Valve Stem,

Pointed Down

f. Spare Tire

G. Tire Retainer H. Hoist Cable I. Hoist Lock (If Equipped) J. Hoist Shaft Access Hole K. Hoist End

Follow these instructions to lower the spare tire: 1. If the vehicle is equipped with a hoist lock, open the

spare tire lock cover on the bumper and use the ignition key to remove the lock.

2. Assemble the wheel wrench and the two jack handle extensions as shown. Insert the hoist end (open end) of the extension through the hole in the rear bumper. Be sure the hoist end of the extension connects into the hoist shaft.

3. Turn the wheel wrench 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. The wheel wrench has a hook that allows you to pull the hoist cable towards you, to assist in reaching the spare tire. 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” next.

4. When the tire has been lowered, tilt the retainer at the end of the cable so it can be pulled up through the wheel opening.

5. Put the spare tire near the flat tire.

Secondary Latch System Your vehicle has an underbody mounted tire hoist assembly equipped with a secondary latch system. It’s designed to stop the spare tire from 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” for instructions on storing the spare or flat tire cnrrectly.

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 below.

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To release the spare tire from the secondary latch do the following:

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

spare tire lowers to the ground, continue with Step 4 of “Removing Your Spare Tire and Tools” earlier in this section.

5. Turn the wrench counterclockwise until

approximately six inches (1 5 cm) of cable is exposed.

6. Stand the wheel blocks on their shortest ends, with the backs facing each other.

1. Check under the vehicle to see if the cable end is

visible.

2. If it is not visible, proceed to Step 6.

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.

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7. Hook the bottom edge of the jack on the wheel

blocks, 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 towards the front of the rear bumper. Position the center lift point of the jack under the center of the spare tire.

If the spare is hanging from the cable, insert the hoist handle, 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.

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

14. If the cable is hanging under the vehicle, turn the wheel wrench in the hoist shaft hole in the bumper clockwise to raise the cable back up.

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.

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

lifts the end fitting.

10. 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.

11. 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.

12. 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.

L

The tools you’ll be using include the bottle jack (A), the wheel blocks (B), the jack handle (C), the jack handle extensions (D), and the wheel wrench (E). If the flat tire is on the rear of the vehicle, you’ll need to use both jack handle extensions.

Attach the wheel wrench to the jack handle extensions (as needed). Attach the jack handle to the jack.

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If your vehicle has wheel nut caps, loosen them by turning the wheel wrench counterclockwise. If you have a center cap with wheel nut caps, the wheel nut caps are designed to remain with the center cap.

Turn the wheel wrench clockwise to raise the jack lift head a little.

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

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Removing the Flat Tire and Installing the Spare Tire

1. Use the wheel wrench to loosen all the wheel nuts. Turn the wheel wrench counterclockwise to loosen the wheel nuts. Don’t remove the wheel nuts yet.

Notice: If your vehicle is equipped with QUADRASTEERTM avoid contact with tie rods and tie rod boots when jacking the vehicle.

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I n

_c_

- w

Rear Location (All Series)

Front W W [rGtion Location ,- . . . . - - . - . . . - 12 Wheel Drive 1500 Series)

E-.-....+

(All Other Series)

2. Position the jack under the vehicle. If the flat tire is

on the front of the vehicle (Two-Wheel Drive 1500 Series 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. 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.

it is jacked up is Getting under a vehicle when 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.

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.

Front Position 2WD 1500 Series

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Front Position All Other Models

/ /

Rear Position

3. Make sure the jack head is positioned so that the rear axle is resting securely between the grooves that are on the jack head. 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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4. Remove all the wheel nuts and take off the flat tire.

5. Remove any rust or dirt

from the wheel bolts, mounting surfaces and spare wheel.

Rust or dirt on the wheel, or on the parts to which it is fastened, can make the wheel nuts become loose after a time. The wheel could come off and cause an accident. When you change a wheel, remove any rust or dirt from the 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 you need to, to get all the rust or dirt off.

Neve, clse oil or grease on s d s or nuts. If you do, the nuts might come loose. Your wheel could fall off, causing a serious accident.

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6. After mounting the spare, reinstall the wheel nuts with the rounded end of the nuts toward the wheel. Tighten each wheel nut by hand using the wheel wrench until the wheel is held against the hub.

Front Position All Other Models

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1

3

\06 2 7 /

8. Tighten the nuts firmly in a crisscross sequence as

shown by turning the wheel wrench clockwise.

Incorrect wheel nuts or improperly tigk ned wheel nuts can cause the wheel to come loose and even come off. This could lead to an accident. Be sure to use the correct wheel nuts. If you have to replace them, be sure to get new GM 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” in the Index for wheel nut torque specification.

Notice: Improperly tightened wheel nuts can lead 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” in the index for the wheel nut torque specification.

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Stor' g a Flat or Spar€ 'ire and Tools

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: An aluminum wheel with a flat tire should always be stored under the vehicle with the hoist. However, storing it that way for an extended period of time could damage the wheel. To avoid this, always stow the wheel properly with the valve stem pointing down and have the wheel repaired as soon as possible. Return the bottle jack, wheel blocks, wheel wrench and jack extensions to their location behind the passenger's seat. Secure the items in the vehicle as shown.

A. Wing Nut B. Wheel Blocks C. Wheel Wrench and Extensions Retainer D. Gloves E. Wheel Wrench and Extensions F. Storage Bag G. Bottle Jack Holder H. Bottle Jack I. Wheel Block Retainer

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Store the tire under the rear of the vehicle in the spare tire carrier. To store the tire, do the following: 1. Put the tire on the ground at the rear of the vehicle

with the valve stem pointed downward and to the rear.

2. Tilt the retainer downward and through the wheel

opening. Make sure that the retainer is fully seated across the underside of the wheel.

3. Attach the wheel wrench and extensions together.

Insert the hoist end through the hole in the rear bumper and into the hoist shaft.

4. Raise the tire part of the way upward. When the tire

is almost in the stored position, adjust the tire so that the valve stem is toward the rear of the vehicle.

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A. Hoist Assembly B. Wheel Wrench C. Extensions D. Hoist Shaft E. Valve Stem, Pointed Down F. Flat or Spare Tire G. Retainer H. Hoist Cable

5. 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. The cable cannot be overtightened.

6. Make sure the tire is stored securely. Push, pull,

and then try to rotate or turn the tire. If the tire moves, use the wheel wrench/hoist shaft to tighten the cable.

Put back the jack, tools and spare tire lock, if equipped.

PUSH & PULL

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Appearance Care Remember, cleaning products can be hazardous. Some are toxic. Others can burst into flames if you strike a match or get them on a hot part of the vehicle. Some are dangerous if you breathe their fumes in a closed space. When you use anything from a container to clean your vehicle, be sure to follow the manufacturer’s warnings and instructions. And always open your doors or windows when you’re cleaning the inside. Never use these to clean your vehicle:

Gasoline Benzene Naphtha Carbon Tetrachloride Acetone Paint Thinner Turpentine Lacquer Thinner Nail Polish Remover

They can all be hazardous - some more than others -and

they can all damage your vehicle, too.

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Don’t use any of these unless this manual says you can. In many uses, these will damage your vehicle:

Alcohol Laundry Soap Bleach Reducing Agents

Cleaning the Inside of Your Vehicle Use a vacuum cleaner often to get rid of dust and loose dirt. Wipe vinyl, leather, plastic and painted surfaces with a clean, damp cloth. FabriclCarpet Your dealer has cleaners for the cleaning of fabric and carpet. They will clean normal spots and stains very well. You can get GM - approved cleaning products from your dealer. See GM Vehicle Care/Appearance Materials on page 5- 108. Here are some cleaning tips:

Always read the instructions on the cleaner label. Clean up stains as soon as you can - before they set. Carefully scrape off any excess stain.

Use a clean cloth or sponge, and change to a clean area often. A soft brush may be used if stains are stubborn. If a ring forms on fabric after spot cleaning, clean the entire area immediately or it will set.

Using Cleaner on Fabric 1. Vacuum and brush the area to remove any

loose dirt.

2. Always clean a whole trim panel or section. Mask

surrounding trim along stitch or welt lines.

3. Follow the directions on the container label. 4. Apply cleaner with a clean sponge. Don’t saturate

the material and don’t rub it roughly.

5. As soon as you’ve cleaned the section, use a

sponge to remove any excess cleaner.

6. Wipe cleaned area with a clean, water-dampened

towel or cloth.

7. Wipe with a clean cloth and let dry.

Special Fabric Cleaning Problems Stains caused by such things as catsup, coffee (black), egg, fruit, fruit juice, milk, soft drinks, vomit, urine and blood can be removed as follows: 1. Carefully scrape off excess stain, then sponge the

soiled area with cool water.

2. If a stain remains, follow the cleaner instructions

described earlier.

3. If an odor lingers after cleaning vomit or urine, treat

the area with a watedbaking soda solution: 1 teaspoon (5 ml) of baking soda to 1 cup (250 mi) of lukewarm water.

4. Let dry. Stains caused by candy, ice cream, mayonnaise, chili sauce and unknown stains can be removed as follows: 1. Carefully scrape off excess stain. 2. Clean with cool water and allow to dry completely. 3. If a stain remains, follow the cleaner instructions

described earlier.

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Interior Plastic Components Use only a mild soap and water solution on a soft cloth or sponge. Commercial cleaners may affect the surface finish. Glass Surfaces Glass should be cleaned often. GM Glass Cleaner or a liquid household glass cleaner will remove normal tobacco smoke and dust films on interior glass. See GM Vehicle Care/Appearance Materials on page 5- 108. Notice: Don’t use abrasive cleaners on glass, because they may cause scratches. Avoid placing decals on the inside rear window, since they may have to be scraped off later. If abrasive cleaners are used on the inside of the rear window, an electric defogger element may be damaged. Any temporary license should not be attached across the defogger grid.

Vinyl Use warm water and a clean cloth.

Rub with a clean, damp cloth to remove dirt. You may have to do this more than once. Things like tar, asphalt and shoe polish will stain if you don’t get them off quickly. Use a clean cloth and vinyl/leather cleaner. See your dealer for this product.

Leather Use a soft cloth with lukewarm water and a mild soap or saddle soap and wipe dry with a soft cloth. Then, let the leather dry naturally. Do not use heat to dry.

For stubborn stains, use a leather cleaner. See your dealer for this product. Never use oils, varnishes, solvent-based or abrasive cleaners, furniture polish or shoe polish on leather. Soiled or stained leather should be cleaned immediately. If dirt is allowed to work into the finish, it can harm the leather.

Top of the Instrument Panel Use only mild soap and water to clean the top surfaces of the instrument panel. Sprays containing silicones or waxes may cause annoying reflections in the windshield and even make it difficult to see through the windshield under certain conditions.

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Care of Safety Belts Keep belts clean and dry.

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 at least every six months. During very cold, damp weather more frequent application may be required. See Part D: Recommended Fluids and Lubricants on page 6-18.

Cleaning the Outside of Your Vehicle The paint finish on your vehicle provides beauty, depth of color, gloss retention and durability. Washing Your Vehicle The best way to preserve your vehicle’s finish is to keep it clean by washing it often with lukewarm or cold water. Don’t wash your vehicle in the direct rays of the sun. Use a car washing soap. Don’t use strong soaps or chemical detergents. Be sure to rinse the vehicle well, removing all soap residue completely. You can get GM-approved cleaning products from your dealer. See GM Vehicle Care/Appearance Materials on page 5-108. Don’t use cleaning agents that are petroleum based, or that contain acid or abrasives. All cleaning agents should be flushed promptly and not allowed to dry on the surface, or 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 your vehicle. If your vehicle is equipped with QUADRASTEERTM see QUADRASTEERTM on page 4-14.

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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.” 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 GM-approved cleaning products from your dealer. See GM Vehicle Care/Appearance Materials on page 5- 108. 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 basecoatklearcoat paint finish. Notice: Machine compounding or aggressive polishing on a basecoatlclearcoat paint finish may dull the finish or leave swirl marks. 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.

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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. Windshield and Wiper Blades If the windshield is not clear after using the windshield washer, or if the wiper blade chatters when running, wax, sap or other material may be on the blade or windshield. Clean the outside of the windshield with a full-strength glass cleaning liquid. The Windshield is clean if beads do not form when you rinse it with water.

Grime from the windshield will stick to the wiper blades and affect their performance. Clean the blade by wiping vigorously with a cloth soaked in full-strength windshield washer solvent. Then rinse the blade with water. Check the wiper blades and clean them as necessary; replace blades that look worn. Aluminum or Chrome-Plated Wheels Your vehicle may be equipped with either aluminum or chrome-plated wheels. Keep your 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. The surface of these wheels is similar to the painted surface of your vehicle. Don’t 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. Use chrome polish only on chrome-plated wheels, but avoid any painted surface of the wheel, and buff off immediately after application. Don’t take your vehicle through an automatic car wash that has silicone carbide tire cleaning brushes. These brushes can also damage the surface of these wheels.

Tires To clean your tires, use a stiff brush with tire cleaner. Notice: When applying a tire dressing, always take care to wipe off any overspray or splash from all painted surfaces on the body or wheels of the vehicle. Petroleum-based products may damage the paint finish and tires. Sheet Metal Damage If your 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.

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 avaliable from your dealer or other service outlets. Larger areas of finish damage can be corrected in your dealer’s body and paint shop.

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Underbody Maintenance

Chemicals used for ice and snow removal and dust control can collect on the underbody. If these are not removed, accelerated corrosion (rust) can occur 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 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 your vehicle. This damage can take two forms; blotchy, ringlet-shaped discolorations, and small irregular dark spots etched into the paint surface. Although no defect in the paint job causes this, GM 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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GM Vehicle Care/Appearance Materials See your GM dealer for more information on purchasing the following products.

GM Vehicle Care/Appearance Materials

Description

Usage

Vinyl Cleaner

upholstery

and

I Glass Cleaner

marks from whitewalls. Cleans vinyl tops,

convertible tops. Removes dirt, grime, smoke and finaermints.

GM Vehicle Care/Appearance Materials

(cont’d)

GM Vehicle Care/Appearance Materials

(cont’d)

Description

Usage

Description

Chrome and Wire Wheel Cleaner

Finish Enhancer

I Swirl Remover Polish

Foaming Tire Shine Low Gloss

Removes dirt and grime from chrome wheels and wire wheel covers. Removes dust, fingerprints, and surface contaminants, Spray on wipe off. Removes swirl marks, fine scratches and other light surface contamination. Removes light scratches and protects finish. Cleans, shines and protects in one easy step, no wiping necessary.

Wash Wax Concentrate

Spot Lifter

Odor Eliminator

Usage Medium foaming shampoo. Cleans and lightly waxes. Biodegradable and phosphate free. Quickly and easily removes spots and stains from carpets, vinyl and cloth upholstery. Odorless spray odor eliminator used on fabrics, vinyl, leather and carpet.

See your General Motors parts department for these products. See Part D: Recommended Fluids and

I Lubricants on page 6-18.

5-1 09

Vehicle Identification Number (VIN) I

Engine Identification The 8th character in your VIN is the engine code. This code will help you identify your engine, specifications and replacement parts. Service Parts Identification Label You’ll find this label located in the glove box. It’s very helpful if you ever need to order parts. On this label is:

your VIN, the model designation, paint information and a list of all production options and special equipment.

Be sure that this label is not removed from the vehicle.

Vehicle Identification

SAMPL€41 JXl M077G7Fi kd

This is the legal identifier for your vehicle. It appears on a plate in the front corner of the instrument panel, on the driver’s side. You can see it if you look through the windshield from outside your vehicle. The VIN also appears on the Vehicle Certification and Service Parts labels and the certificates of title and registration.

5-1 10

Electrical System

Add-on Electrical Equipment

Notice: Don’t add anything electrical to your vehicle unless you check with your dealer first. Some electrical equipment can damage your vehicle and the damage wouldn’t be covered by your warranty. Some add-on electrical equipment can keep other components from working as they should. Your vehicle has an air bag system. Before attempting to add anything electrical to your vehicle, see Servicing Your Air Bag-Equipped Vehicle on page 1-77.

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. When the current load is too heavy, the circuit breaker opens and closes, 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. If you ever have a problem on the road and don’t have a spare fuse, you can borrow one that has the same amperage. Just pick some feature of your vehicle that you can get along without - like the radio or cigarette lighter - and use its fuse, if it is the correct amperage. Replace it as soon as you can.

5-1 11

Instrument Panel Fuse Block

You can remove fuses with a fuse extractor which is mounted to the fuse block access door. To remove fuses, if you don't have a fuse extractor, hold the end of the fuse between your thumb and index finger and pull straight out. You may have spare fuses located behind the fuse block access door. These can be used to replace a bad fuse. However, make sure it is of the correct amperage.

5-1 12

I Fuses I RR Wioer SEO ACCY WS WPR

I Usage I Not Used Special Equipment Option Accessory Windshield Wipers

Ignition, Heated Seats Four-wheel Drive System, Auxiliary Battery Climate Control System Power Door Lock Relay (Lock Function) Climate Control System Driver’s Door Harness Connection Cruise Control, Power Take Off (PTO) Power Door Lock Relay (Unlock Function)

IGN 3 4WD HTR N C LOCK (Relay) HVAC 1 L DOOR

CRUISE

UNLOCK (Relay)

DRIVER UNLOCK

VEH CHMSL

VEH STOP

RT TRN

CB LT DOORS TBC 2B TBC 2A

I Right Turn Signals and

Sidemarkers

I Left Power Windows Circuit

Breaker Truck Truck

Body Bodv

Controller Controller

5-1 13

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

12-WAY

Defogger

Relay Rear

DEFOG HDLNR 1 SPARE RELAY Not Used CB SEAT

CB RT DOOR SPARE -~ INFO

~. .-

5-1 14

Wirina Headliner Connector

Driver and Passenger Seat Module Circuit Breaker Right Power Windows Circuit Breaker I Not Infotainment Harness Connection

Used

Underhood Fuse Block

The underhood fuse block in the engine compartment on the driver’s side of the vehicle near the battery. Lift the cover for access to the fuse/relay block. To remove fuses hold the end of the fuse between your thumb and index finger and pull straight out, See Engine Comparfment Overview on page 5- 12 for more information on its location.

. ...

5-1 15

Replace cover after servicing.

,--x.

B+

Remettre le couvercle en place.

.-..

FUNCTION/AMP-GAS

FUNCTION/AMP-DIESEL

FONCTION/INTENSIT~ESSENCE

FONCTION/INTENSITi-DlESEL

INJ 2/15A

EDU/25A ECMRPVI15A FUEL HT/15A ECMI/15A EDU

* REMARQUE: La fonction et I’intensitA dc ces fusibles sont diff&rentes pour moteurs i essence et les moteurs diesel. Voir le Guide du proprichre 1 et 2. les fonctions des plots

pour

les

NOTE: The function and amperage of these fuses are different for gas and diesel fueled engines. See Owners Manual functions of studs #I and #2.

for

5-1 16

-1 - Gasoline Engine and Diesel Engine. *2 - Gasoline Engine; ECMRPV - Diesel Engine. *3 - Gasoline Engine; FUEL HT - Diesel Engine. *4 - Gasoline Engine; ECM I - Diesel Engine. *5 - IGN/EDU

Fuses

GLOW PLUG

CUST FEED

STUD #I

MBEC

BLOWER

LBEC

STUD 2

LBEC 1

TBC BATT

I Left Doors, Truck Body

Controller, Flasher Module

I Feed

Truck Body Controller Battery

5-1 17

1 Usage I Sunroof

Vent Solenoid Canister/QUADRASTEERTM Module Power

Auxiliary Power Outlet - Console

I Ignition Relay

~~

~~

Powertrain Control Module Electronic Throttle Control, Electronic Brake Controller Instrument Panel Cluster, Air Conditioning Relay, Turn SignaVHazard Switch, Starter Relay Ride Control Backup Lamps Trailer Wiring Powertrain Control Module, Fuel Pump

~~

~~

I Fuel Pump (Relay)

Fuses

B/U LP

RR DEFOG HDLP-HI PRIME 02B

SIR

FRT PARK

DRL

SEO IGN TBC IGN1 HI HDLP-LT LH HID DRL

Usage Back-up Lamps, Automatic Transmission Shift Lock Control System Rear Window Defogger Headlamp High Beam Relay Not Used Oxygen Sensors Supplemental Inflatable Restraint System Front Parking Lamps, Sidemarker Lamps Daytime Running Lamps t Relay) Rear Defog Relay Truck Body Controller Ignition High Beam Headlamp-Left Not Used Daytime Running Lamps

Fuses SUNROOF SEO 82

4 w s

AUX PWR

IGN 1 PCM 1

ETC/ECM

IGN E

RTD TRL B/U

PCM B

F/PM P

5-1 18

IPC/DIC

~ CIG LTR HI HDLP-RT HDLP-LOW ~~~ A/C COMP Air Conditioning A/C COMP

WPR

RR RADIO

SEO B1

LO HDLP-LT

BTSl

CRANK LO HDLP-RT

Lighter

Compressor Air Conditioning Compressor

I Cigarette I High Beam Headlamp-Right I Headlamp Low Beam Relay I Relay I Not Used I Audio System Mid Bussed Electrical Center, Rear Heated Seats, HomeLink I Headlamp Low Beam-Left I Brake Transmission Shift Interlock System I Starting System I Headlamp Low Beam-Right

I Fuses I FOG LP I FOG LP I HORN I WJS WASH

W/S WASH

I RADIO AMP I RH HID I HORN I EAP

1 Usage I Fog Lamp Relay I Fog Lamps I Horn Relay I Relay Windshield Washer Pump I Windshield Washer Pump

OnStar/Rear Seat Entertainment

I Radio Amplifier I Not Used I Horn I Not Used

5-1 19

Capacities and Specifications Please refer to Part D: Recommended Fluids and Lubricants on page 6-18 for more information. All capacities are approximate. When adding see the refrigerant charge label under the hood for charge capacity information and requirements.

VIN Code

Capacities and Specifications Type V6 va V8 V8 V8

~~

~~

~~

~~

Spark Plug Gap

0.060 inches (1.52 mm)

I 0.060 inches (1.52 mm) I 0.060 inches (1.52 mm)

~~

0.060 inches (1.52 mm) 0.060 inches (1 5 2 mm)

~~~

~~

Torque 140 Ib ft (190 Nom)

Description 6 Bolts (1 4 mm) 8 bolts (14 mm) See the Certificationflire label on the rear edge of the driver's door or the incomplete vehicle document in the cab.

140 Ibft (190N.m)

Engine VORTEC 4300 V6 VORTEC 4800 V8 VORTEC 5300 V8 VORTEC 6000 V8 VORTEC 8100 V8

Model C/K 1500 & C/K 2500 CIK 3500

Tire Pressure

5-1 20

After refill, the level must be rechecked. See “Cooling System” in the Index.

VORTEC 4300 V6 Automatic Transmission

Cooling System

VORTEC 4300 V6 Manual Transmission

VORTEC 4800 V8 Automatic Transmission

VORTEC 4800 V8 Manual Transmission

VORTEC 5300 V8 Automatic Transmission

VORTEC 5300 V8** Automatic Transmission

VORTEC 6000 V8 Automatic Transmission

VORTEC 6000 V8* Automatic Transmission

VORTEC 6000 V8 Manual Transmission

5-1 21

Application

VORTEC 6000 V8* Manual Transmission

VORTEC 81 00 V8 Manual Transmission

VORTEC 81 00 V8 Automatic Transmission

English

14.8 quarts

21 .I quarts

I 20.7 quarts

(14.0 L)

(20.0 L)

(19.6 L)

* Vehicles equipped with the optional engine oil cooler.

** Vehicles equipped with the optional air conditioner.

After refill, the level must be rechecked. Add enough engine oil so that the fluid is within the proper operating range. See Engine Oil on page 5- 17. VORTEC 4300 V6 (Vin W)

Engine Oil With Filter

Metric

VORTEC 4800 V8 ( Vin V)

VORTEC 5300 V8 (Vin T)

VORTEC 6000 V8 (Vin U)

VORTEC 8100 V8 (Vin G)

5-1 22

6.0 quarts

(5.7 L)

6.5 quarts

(6.1 L)

Application

Short Bed

Long Bed

Chassis Cab (pickup Box Delete)

Chassis Cab 3500

Chassis Cab 3500 (California)

Chassis Cab 3500

Chassis Cab 3500 (California)

Chassis Cab 3500HD

Chassis Cab 3500HD

Air Conditioning Refrigerant Capacity Air Conditioning Refrigerant R-l34a

Fuel Tank

I Metric

26.0 gallons

34.0 gallons

34.0 gallons

27.0 gallons

23.0 gallons

24.0 gallons

23.0 gallons

27.0 gallons

27.0 gallons

23.0 gallons

18.0 gallons

23.0 gallons

128 L

(128 L)

(1 02 L) (front) (87 L) (rear) (90 L) (front) (87 L) (rear)

(102 L (front)

(1 02 L) (front)

(87 L) (front) (68 L) (rear)

(87 L) (front)

1.76 Ibs

(0.08 kg)

5-1 23

Normal Maintenance Replacement Parts

*ACDelco@ part number ** GM part number ***Denso part number ?AI 51 8C high-capacity air cleaner filter may be substituted. ttNGK part number

5-1 24

Section 6 Maintenance Schedule

Maintenance Schedule ...................................... 6.2 Introduction ................................................... 6-2 Your Vehicle and the Environment .................... 6-2 Maintenance Requirements .............................. 6-2 How This Section is Organized ......................... 6-3 Part A: Scheduled Maintenance Services ........... 6-4 Using Your Maintenance Schedule 6-4 Scheduled Maintenance ................................... 6-5 Part B: Owner Checks and Services ................ 6-1 1 At the First 100, 1, 000 and 6, 000 Miles

....................

(160, 1 600 and 10 000km) ........................ 6-11 At Each Fuel Fill .......................................... 6-1 1 At Least Once a Month ................................. 6-1 1

At Least Twice a Year ............................... 6-12 At Least Once a Year ................................... 6-13 Part C: Periodic Maintenance Inspections ........ -6-1 6 Steering and Suspension Inspection ................ 6-16 Exhaust System Inspection ............................ 6.16 Fuel System Inspection .................................. 6-16 Engine Cooling System Inspection ................... 6-16 Throttle System Inspection ............................ -6-17 Transfer Case and Front Axle 6-17 Brake System Inspection ................................ 6-17 Part D: Recommended Fluids and Lubricants ...... 6-18 Part E: Maintenance Record ........................... 6-21

(Four-wheel Drive) Inspection .....................

6-1

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 procedures are 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, please maintain your vehicle properly. Maintenance Requirements Maintenance intervals, checks, inspections 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 recommended maintenance may not be covered by warranty.

Maintenance Schedule

Introduction

IMPORTANT: KEEP ENGINE OIL AT THE PROPER

LNEL 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 for details.

6-2

How This Section is Organized This maintenance schedule is divided into five parts: “Part A: Scheduled Maintenance Services” explains what to have done and how often. Some of these services can be complex, so unless you are technically qualified and have the necessary equipment, you should let your dealer’s service department or another aualified service center do these jobs.

1 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, have a qualified technician do the work.

If you want to get the service information, see Service Publications Ordering Information on page 7- IO. “Part B: Owner Checks and Services” tells you what should be checked and when. It also explains what you can easily do to help keep your vehicle in good condition. “Part C: Periodic Maintenance Inspections” explains important inspections that your dealer’s service department or another qualified service center should perform. “Part D: Recommended Fluids and Lubricants” lists some recommended products necessary to help keep your vehicle properly maintained. These products, or their equivalents, should be used whether you do the work yourself or have it done. “Part E: Maintenance Record” is a place for you to record and keep track of the maintenance performed on your vehicle. Keep your maintenance receipts. They may be needed to qualify your vehicle for warranty repairs.

6-3

Part A: Scheduled Services

Maintenance

and chassis lubrication

This part contains engine oil scheduled maintenance which explains the engine oil life system and how it indicates when to change the engine oil and filter. Lubricate chassis components with each oil change. Also, listed are scheduled maintenance services which are to be performed at the mileage intervals specified.

Using Your Maintenance Schedule

We at General Motors want to help you keep your vehicle in good working condition. But we don’t know exactly how you’ll drive it. You may drive very short distances only a few times a week. Or you may drive long distances all the time in very hot, dusty weather. You may use your vehicle in making deliveries. Or you may 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 may 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.

6-4

This part tells you the maintenance services you should have done and when you should schedule them. When you go to your dealer for your service needs, you’ll know that GM-trained and supported service people will perform the work using genuine GM parts. The proper fluids and lubricants to use are listed in Part D. Make sure whoever services your vehicle uses these. All parts should be replaced and all necessary repairs done before you or anyone else drives the vehicle. This schedule is for vehicles that:

carry passengers and cargo within recommended limits. You will find these limits on your vehicle’s Certificationflire label. See Loading Your Vehicle on page 4-56. are driven on reasonable road surfaces within legal driving limits. are driven off-road in the recommended manner. See Off-Road Driving with Your Four- Wheel-Drive Vehicle on page 4-21. use the recommended fuel. See Gasoline Octane on page 5-5.

Scheduled Maintenance

The services shown in this schedule up to 100,000 miles (1 66 000 km) should be repeated after 100,000 miles (1 66 000 km) at the same intervals for the life of this vehicle. The services shown at 150,000 miles (240 000 km) and 200,000 miles (332 000 km) should be repeated at the same interval after 150,000 miles (240 000 km) and 200,000 miles (332 000 km) for the life of this vehicle. See Part B: Owner Checks and Services on page 6-1 1 and Part C: Periodic Maintenance Inspections on page 6-16. Footnotes t 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. + A good time to check your brakes is during tire rotation. See Brake System Inspection on page 6- 17.

Engine Oil and Chassis Lubrication Scheduled Maintenance Change engine oil and filter as indicated by the GM Oil Life SystemTM (or every 12 months, whichever occurs first). Reset the system. Your vehicle has a computer system that lets you know when to change the engine oil and filter. This is based on engine revolutions and engine temperature, and not on mileage. Based on driving conditions, the mileage at which an oil change will be indicated can vary considerably. For the oil life system to work properly, you must reset the system every time the oil is changed. When the system has calculated that oil life has been diminished, it will indicate that an oil change is necessary. A CHANGE ENGINE OIL message will come on. Change your oil as soon as possible within the next two times you stop for fuel. It is possible that, if you are driving under the best conditions, the oil life system may not indicate that an oil change 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. It is also important to check your oil regularly and keep it at the proper level.

6-5

If the system is ever reset accidentally, you must change your oil at 3,000 miles (5 000 km) since your last oil change. Remember to reset the oil life system whenever the oil is changed. See Engine Oil on page 5-17for information on resetting the system. An Emission Control Service. Lubricate chassis components with each engine oil and filter change. Vehicles used under severe commercial operating conditions require lubrication on a regular basis every 3,000 miles (5 000 km). Lubricate the front suspension, ball joints, steering linkage, transmission shift linkage and parking brake cable guides. Ball joints should not be lubricated unless their temperature is 10°F (-12°C) or higher or they could be damaged. After the services are performed, record the date, odometer reading and who performed the service on the maintenance record pages in Part E of this schedule.

7,500 Miles (12 500 km) 0 Check readfront axle fluid level and add fluid as

needed. Check constant velocity joints and axle seals for leaking.

0 Rotate tires. See Tire Inspection and Rotation on

page 5-74 for proper rotation pattern and additional information. (See footnote +-)

control-main filter.

Cl Allison Transmission Only: Replace the external 15,000 Miles (25 000 km) 0 Inspect engine air cleaner filter if you are driving in

dusty conditions. Replace filter if necessary. An Emission Control Service. (See footnote f.) U Check rear/front axle fluid level and add fluid as

needed. Check constant velocity joints and axle seals for leaking.

0 Rotate tires. See Tire Inspection and Rotation on

page 5-74 for proper rotation pattern and additional information. (See footnote +.)

22,500 Miles (37 500 km) 0 Check readfront axle fluid level and add fluid as

needed. Check constant velocity joints and axle seals for leaking.

6-6

0 Rotate tires. See Tire Inspection and Rotation on

page 5-74 for proper rotation pattern and additional information.(See footnote +.)

25,000 Miles (41 500 km) CI Allison Transmission Only: Change automatic

transmission fluid and filters 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.

37,500 Miles (62 500 km) U Check readfront axle fluid level and add fluid as

needed. Check constant velocity joints and axle seals for leaking.

iII Rotate tires. See Tire Inspection and Rotation on page 5-74 for proper rotation pattern and additional information. (See footnote +.)

45,000 Miles (75 000 km) U Inspect engine air cleaner filter if you are driving in

dusty conditions. Replace filter if necessary. An Emission Control Service. (See footnote t.) U Check readfront axle fluid level and add fluid as

needed. Check constant velocity joints and axle seals for leaking.

0 Rotate tires. See Tire Inspection and Rotation on

page 5-74 for proper rotation pattern and additional information. (See footnote +.)

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

service.

If you don’t use your vehicle under any of these conditions, change the fluid and filter every 50,000 miles (83 000 km). 30,000 Miles (50 000 km) U Check readfront axle fluid level and add fluid as

needed. Check constant velocity joints and axle seals for leaking.

0 Rotate tires. See Tire Inspection and Rotation on

page 5-74 for proper rotation pattern and additional information. (See footnote +.) (See footnote t.)

LI Replace fuel filter. An Emission Control Service.

0 Replace engine air cleaner filter. An Emission

Control Service.

6-7

50,000 Miles (83 000 km) 0 Change automatic transmission fluid and filter if the vehicle’s GVWR is over 8600 Ibs, if the vehicle has an Allison transmission 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.

Except Allison Transmission: If you do not use your vehicle under any of these conditions, change the fluid and filter at 100,000 miles (166 000 km). Cl Automatic Transfer Case Only: Change transfer

case fluid.

52,500 Miles (87 500 km) 0 Check readfront axle fluid level and add fluid as

needed. Check constant velocity joints and axle seals for leaking.

0 Rotate tires. See. Tire Inspection and Rotation on

page 5-74 for proper rotation pattern and additional information. (See footnote +.)

6-8

60,000 Miles (100 000 km) 0 Check readfront axle fluid level and add fluid as

needed. Check constant velocity joints and axle seals for leaking.

0 Rotate tires. See Tire Inspection and Rotation on

page 5-74 for proper rotation pattern and additional information. (See footnote +.) (See footnote t.)

0 Replace fuel filter. An Emission Control Service

0 Replace engine air cleaner filter. An Emission

Control Service.

0 Inspect Evaporative Control System. Check all fuel

and vapor lines and hoses for proper hook-up, routing and condition. Check that the purge valve works properly, if equipped. Replace as needed. An Emission Control Service. (See footnote t.)

67,500 Miles (112 500 km) 0 Check readfront axle fluid level and add fluid as

needed. Check constant velocity joints and axle seals for leaking.

0 Rotate tires. See Tire Inspection and Rotation on

page 5-74 for proper rotation pattern and additional information. (See footnote +.)

75,000 Miles (125 000 km) 0 Inspect engine air cleaner filter if you are driving in

dusty conditions. Replace filter if necessary. An Emission Control Service. (See footnote t.) U Check readfront axle fluid level and add fluid as

needed. Check constant velocity joints and axle seals for leaking.

CI Allison Transmission Only: Change automatic

transmission fluid and filter 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.

If you do not use your vehicle under any of these conditions, change the fluid and filter at 50,000 miles (83 000 km). 0 Rotate tires. See Tire Inspection and Rotation on

page 5-74 for proper rotation pattern and additional information. (See footnote +.)

82,500 Miles (137 500 km) U Check readfront axle fluid level and add fluid as

needed. Check constant velocity joints and axle seals for leaking.

0 Rotate tires. See Tire Inspection and Rotation on

page 5-74 for proper rotation pattern and additional information. (See footnote +.)

90,000 Miles (150 000 km) 0 Check readfront axle fluid level and add fluid as

needed. Check constant velocity joints and axle seals for leaking. (See Footnote t.)

0 Replace fuel filter. An Emission Control Service.

0 Replace engine air cleaner filter. An Emission

Control Service.

0 Rotate tires. See Tire Inspection and Rotation on

page 5-74 for proper rotation pattern and additional information. (See footnote +.)

97,500 Miles (162 500 km) 0 Check readfront axle fluid level and add fluid as

needed. Check constant velocity joints and axle seals for leaking.

CI Rotate tires. See Tire Inspection and Rotation on

page 5-74 for proper rotation pattern and additional information. (See footnote +.)

6-9

150,000 Miles (240 000 km) 0 Drain, flush and refill cooling system (or every

60 months since last service, whichever occurs first). See Engine Coolant on page 5-33 for what to use. Inspect hoses. Clean radiator, condenser, pressure cap and neck. Pressure test the cooling system and pressure cap. An Emission Control Service.

0 Change five-speed manual transmission fluid (with

4300 V6 or 4800 V8 engines only).