2002 GMC Sierra Owners Manual

Just look at the brake fluid reservoir. The fluid level should be above MIN. If it isn’t, have your brake system checked to see if there is a leak. After work is done on the brake hydraulic system, make sure the level is above the MIN but not over the MAX mark.

What to Add When you do need brake fluid, use only DOT-3 brake fluid. Refer to “Recommended Fluids and Lubricants” in the Index. Use new brake fluid from a sealed container only. Always clean the brake fluid reservoir cap and the area around the cap before removing it. This will help keep dirt from entering the reservoir.

CAUTION:

With the wrong kind of fluid in your brake system, your brakes may not work well, or they may not even work at all. This could cause a crash. Always use the proper brake fluid.

NOTICE:

D Using the wrong fluid can badly damage

brake system parts. For example, just a few drops of mineral-based oil, such as engine oil, in your brake system can damage brake system parts so badly that they’ll have to be replaced. Don’t let someone put in the wrong kind of fluid.

D If you spill brake fluid on your vehicle’s painted surfaces, the paint finish can be damaged. Be careful not to spill brake fluid on your vehicle. If you do, wash it off immediately. See “Appearance Care” in the Index.

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Brake Wear Your vehicle has four-wheel disc brakes. Disc brake pads have built-in wear indicators that make a high-pitched warning sound when the brake pads are worn and new pads are needed. The sound may come and go or be heard all the time your vehicle is moving (except when you are pushing on the brake pedal firmly).

CAUTION:

The brake wear warning sound means that soon your brakes won’t work well. That could lead to an accident. When you hear the brake wear warning sound, have your vehicle serviced.

NOTICE:

Continuing to drive with worn-out brake pads could result in costly brake repair.

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Some driving conditions or climates may cause a brake squeal when the brakes are first applied or lightly applied. This does not mean something is wrong with your brakes. Properly torqued wheel nuts are necessary to help prevent brake pulsation. When tires are rotated, inspect brake pads for wear and evenly tighten wheel nuts in the proper sequence to GM torque specifications. Brake linings should always be replaced as complete axle sets. See “Brake System Inspection” in Section 7 of this manual under Part C “Periodic Maintenance Inspections.” Brake Pedal Travel See your dealer if the brake pedal does not return to normal height, or if there is a rapid increase in pedal travel. This could be a sign of brake trouble. Brake Adjustment Every time you make a brake stop, your disc brakes adjust for wear.

Replacing Brake System Parts The braking system on a vehicle is complex. Its many parts have to be of top quality and work well together if the vehicle is to have really good braking. Your vehicle was designed and tested with top-quality GM brake parts. When you replace parts of your braking system -- for example, when your brake linings wear down and you need new ones put in -- be sure you get new approved GM replacement parts. If you don’t, your brakes may no longer work properly. For example, if someone puts in brake linings that are wrong for your vehicle, the balance between your front and rear brakes can change -- for the worse. The braking performance you’ve come to expect can change in many other ways if someone puts in the wrong replacement brake parts.

Battery Your new vehicle comes with a maintenance free ACDelcoR battery. When it’s time for a new battery, get one that has the replacement number shown on the original battery’s label. We recommend an ACDelco battery. See “Engine Compartment Overview” in the Index for battery location. WARNING: Battery posts, terminals and related accessories contain lead and lead compounds, chemicals known to the State of California to cause cancer and reproductive harm. Wash hands after handling.

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Vehicle Storage If you’re not going to drive your vehicle for 25 days or more, remove the black, negative (-) cable from the battery. This will help keep your battery from running down.

CAUTION:

Batteries have acid that can burn you and gas that can explode. You can be badly hurt if you aren’t careful. See “Jump Starting” in the Index for tips on working around a battery without getting hurt.

Contact your dealer to learn how to prepare your vehicle for longer storage periods. Also, for your audio system, see “Theft-Deterrent Feature” in the Index.

Bulb Replacement For any bulb changing procedure not listed in this section, contact your dealer. See “Replacement Bulbs” in the Index for the proper types of bulbs to use. Halogen Bulbs

CAUTION:

Halogen bulbs have pressurized gas inside and can burst if you drop or scratch the bulb. You or others could be injured. Be sure to read and follow the instructions on the bulb package.

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Headlamps

1. Remove the two pins on the top of the headlamp assembly. To remove the pins, turn the outer pin outward and pull it straight up. To remove the inner pin, turn it in and pull it straight up.

A. Low-Beam Headlamp B. High-Beam Headlamp

2. Pull the headlamp assembly out. 3. Unplug the electrical connector. 4. Turn the old bulb counterclockwise and remove it

from the headlamp assembly.

5. Put the new bulb into the assembly and turn it

clockwise until it is tight. Use care not to touch the bulb with your fingers or hands. 6. Plug in the electrical connector. 7. Put the headlamp assembly back into the vehicle.

Install the two pins.

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Front Turn Signal, Sidemarker and Daytime Running Lamps

1. Remove the headlamp assembly as

mentioned previously.

2. Press the retainer clip, located behind the turn signal

housing, towards the outside of the vehicle.

3. Pull the turn signal housing out from the vehicle. 4. Press the locking release lever, turn the bulb

socket counterclockwise and remove it from the turn signal housing.

5. Remove the old bulb from the bulb socket. 6. Put the new bulb into the bulb socket. Use care not

to touch the bulb with your fingers or hands.

7. Put the bulb socket into the turn signal housing and

turn it clockwise until it locks.

8. Put the turn signal housing back onto the vehicle

placing the hook and posts on the inner side into the alignment holes first and then the outer side into the retainer bracket until you hear a click.

9. Put the headlamp assembly back into the vehicle.

A. Sidemarker Lamp B. Retainer Clip C. Front Turn Signal Lamp D. Daytime Running Lamp

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Center High-Mounted Stoplamp (CHMSL) and Cargo Lamp

1. Remove the screws and lift off the lamp assembly.

A. Cargo Lamps B. Center High-Mounted Stoplamps

2. Remove the CHMSL bulb holder back plate from the

housing by pressing the release tabs.

3. Remove the CHMSL bulb by pulling the bulb

straight out from the holder back plate. Remove a cargo bulb by turning the socket counterclockwise and pulling the bulb straight out.

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Pickup Box Identification Lamps/Fender Marker Lamps 1. Remove the screws and lamp assembly. 2. Unplug the lamp assembly harness. 3. Use a screwdriver to gently pry the individual lamp

from the lamp housing.

4. Unplug the lamp at the connector. 5. Plug in a new lamp and snap it into the housing. 6. Reinstall the lamp housing.

4. If a CHMSL bulb is replaced, put the new bulb into

the socket and press it in until it is tight. If a cargo lamp is replaced, put a new cargo lamp bulb into the socket and press it in until it is tight before turning the socket counterclockwise.

5. Put the bulb holder back plate into the lamp housing. 6. Reinstall the lamp assembly and tighten the screws.

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Taillamps (Pickup Models) 1. Open the tailgate.

2. Remove the two rear

lamp assembly screws near the tailgate latch and pull out the lamp assembly.

A. Stoplamp B. Turn Signal Lamp C. Back-up Lamp

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Taillamps (Chassis Cab Models)

A. Turn Signal Lamp B. Stoplamp C. Back-up Lamp

3. Press the release tab and turn the bulb

socket counterclockwise to remove it from the taillamp housing.

4. Pull the old bulb straight out from the socket. 5. Press a new bulb into the socket and turn the socket

clockwise into the taillamp housing until it clicks.

6. Reinstall the rear lamp assembly. 7. Close the tailgate.

1. Using your hands, peel the rubber seal away from

the lens.

2. Lift the lens off the lamp assembly. 3. Pull the old bulb straight out from the socket. 4. Put a new bulb into the socket and press it in until it

is tight.

5. Reinstall the lens and the lens seal.

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Roof Marker Lamps

1. Remove the two screws

and lift off the lens.

2. The center roof marker lamps has six screws

to remove.

3. Turn the old bulb counterclockwise to remove it

from the socket.

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4. Put a new bulb into the

socket and turn clockwise until it locks in place.

5. Reinstall the lens and tighten the screws.

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Windshield Wiper Blade Replacement Windshield wiper blades should be inspected at least twice a year for wear and cracking. See “Wiper Blade Check” in the Index for more information. Replacement blades come in different types and are removed in different ways. For proper type and length, see “Normal Maintenance Replacement Parts” in the Index.

To replace the windshield wiper blade assembly, do the following: 1. Lift the wiper arm and turn the blade until it is facing

away from the windshield.

2. Push the release lever and slide the wiper assembly

toward the driver’s side of the vehicle.

3. Install a new blade by reversing Steps 1 and 2.

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Tires Your new vehicle comes with high-quality tires made by a leading tire manufacturer. If you ever have questions about your tire warranty and where to obtain service, see your GM Warranty booklet for details.

CAUTION:

Poorly maintained and improperly used tires are dangerous. D Overloading your tires can cause

overheating as a result of too much friction. You could have an air-out and a serious accident. See “Loading Your Vehicle” in the Index.

CAUTION: (Continued)

CAUTION: (Continued)

D Underinflated tires pose the same danger as overloaded tires. The resulting accident could cause serious injury. Check all tires frequently to maintain the recommended pressure. Tire pressure should be checked when your tires are cold.

D Overinflated tires are more likely to be

cut, punctured or broken by a sudden impact -- such as when you hit a pothole. Keep tires at the recommended pressure.

D Worn, old tires can cause accidents. If your

tread is badly worn, or if your tires have been damaged, replace them.

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Inflation -- Tire Pressure The Certification/Tire label, which is on the rear edge of the driver’s door, shows the correct inflation pressures for your tires when they’re cold. “Cold” means your vehicle has been sitting for at least three hours or driven no more than 1 mile (1.6 km).

NOTICE:

Don’t let anyone tell you that underinflation or overinflation is all right. It’s not. If your tires don’t have enough air (underinflation), you can get the following: D Too much flexing D Too much heat D Tire overloading D Bad wear D Bad handling D Bad fuel economy

NOTICE: (Continued)

NOTICE: (Continued)

If your tires have too much air (overinflation), you can get the following: D Unusual wear D Bad handling D Rough ride D Needless damage from road hazards

When to Check Check your tires once a month or more. Also, check the tire pressure of the spare tire.

How to Check Use a good quality pocket-type gage to check tire pressure. You can’t tell if your tires are properly inflated simply by looking at them. Radial tires may look properly inflated even when they’re underinflated. Be sure to put the valve caps back on the valve stems. They help prevent leaks by keeping out dirt and moisture.

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Tire Inspection and Rotation Tires should be rotated every 6,000 to 8,000 miles (10 000 to 13 000 km). Any time you notice unusual wear, rotate your tires as soon as possible and check wheel alignment. Also check for damaged tires or wheels. See “When It’s Time for New Tires” and “Wheel Replacement” later in this section for more information. Make sure the spare tire is stored securely. Push, pull, and then try to rotate or turn the tire. If it moves, use the wheel wrench/hoist shaft to tighten the cable. See “Storing a Flat or Spare Tire and Tools” in the Index. If your vehicle has dual rear wheels, also see “Dual Tire Operation” later in this section. The purpose of regular rotation is to achieve more uniform wear for all tires on the vehicle. The first rotation is the most important. See “Scheduled Maintenance Services” in the Index for scheduled rotation intervals.

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If your vehicle has single rear wheels and the tread design for your front tires is the same as your rear tires, always use one of the correct rotation patterns shown here when rotating your tires. If your vehicle has front tires with different tread designs (such as all season vs. on/off road) than the rear tires, don’t rotate your tires front to rear.

If your vehicle has dual rear wheels and the tread design for your front tires is the same as your rear tires, always use one of the correct rotation patterns shown here when rotating your tires.

If your vehicle has dual rear wheels and the tread design for the front tires is different from the dual rear tires, always use the correct rotation pattern shown here when rotating your tires.

The dual tires are rotated as a pair, and the inside rear tires become the outside rear tires. When you install dual wheels, be sure the vent holes in the inner and outer wheels on each side are lined up. After the tires have been rotated, adjust the front and rear inflation pressures as shown on the Certification/Tire label. Make certain that all wheel nuts are properly tightened. See “Wheel Nut Torque” in the Index.

CAUTION:

Rust or dirt on a wheel, or on the parts to which it is fastened, can make 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 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. See “Changing a Flat Tire” in the Index.

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When It’s Time for New Tires

One way to tell when it’s time for new tires is to check the treadwear indicators, which will appear when your tires have only 1/16 inch (1.6 mm) or less of tread remaining. Some commercial truck tires may not have treadwear indicators.

You need a new tire if any of the following statements are true: D You can see the indicators at three or more places

around the tire.

D You can see cord or fabric showing through the

tire’s rubber.

D The tread or sidewall is cracked, cut or snagged deep

enough to show cord or fabric.

D The tire has a bump, bulge or split. D The tire has a puncture, cut or other damage that

can’t be repaired well because of the size or location of the damage.

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Dual Tire Operation When the vehicle is new, or whenever a wheel, wheel bolt or wheel nut is replaced, check the wheel nut torque after 100, 1,000 and 6,000 miles (160, 1 600 and 10 000 km) of driving. For proper torque, see “Wheel Nut Torque” in the Index. The outer tire on a dual wheel setup generally wears faster than the inner tire. Your tires will wear more evenly and last longer if you rotate the tires periodically. If you’re going to be doing a lot of driving on high-crown roads, you can reduce tire wear by adding 5 psi (35 kPa) to the tire pressure in the outer tires. Be sure to return to the recommended pressures when no longer driving under those conditions. See “Tires” and “Inflation - Tire Pressure“ in the Index for more information on proper tire inflation.

CAUTION:

If you operate your vehicle with a tire that is badly underinflated, the tire can overheat. An overheated tire can lose air suddenly or catch fire. You or others could be injured. Be sure all tires (including the spare) are properly inflated.

Buying New Tires To find out what kind and size of tires you need, look at the Certification/Tire label. The tires installed on your vehicle when it was new had a Tire Performance Criteria Specification (TPC Spec) number on each tire’s sidewall. When you get new tires, get ones with that same TPC Spec number. That way your vehicle will continue to have tires that are designed to give proper endurance, handling, speed rating, traction, ride and other things during normal service on your vehicle. If your tires have an all-season tread design, the TPC number will be followed by an “MS” (for mud and snow). 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.

CAUTION:

Mixing tires could cause you to lose control while driving. If you mix tires of different sizes or types (radial and bias-belted tires), the vehicle may not handle properly, and 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.

CAUTION:

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 1/2) 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 include acceleration, cornering, hydroplaning, or peak traction characteristics.

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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.

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 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.

CAUTION:

Using the wrong replacement wheels, wheel 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.

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Used Replacement Wheels

CAUTION:

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 (160, 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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NOTICE:

If your vehicle does not have dual wheels and is equipped with a tire size other than P265/75R16
or LT265/75R16, 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

CAUTION:

If your vehicle has dual wheels or P265/75R16 or LT265/75R16 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 your vehicle, 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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Appearance Care Remember, cleaning products can be hazardous. Some are toxic. Others can burst into flame 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: D Gasoline D Benzene D Naphtha D Carbon Tetrachloride D Acetone

D Paint Thinner D Turpentine D Lacquer Thinner D Nail Polish Remover They can all be hazardous -- some more than others -- and they can all damage your vehicle, too. Don’t use any of these unless this manual says you can. In many uses, these will damage your vehicle: D Alcohol D Laundry Soap D Bleach D 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.

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Cleaning of Fabric/Carpet 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 “Appearance Care and Materials” in the Index. Here are some cleaning tips: D Always read the instructions on the cleaner label. D Clean up stains as soon as you can -- before they set. D Carefully scrape off any excess stain. D Use a clean cloth or sponge, and change to a

clean area often. A soft brush may be used if stains are stubborn.

D 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 water/baking soda solution: 1 teaspoon (5 ml) of baking soda to 1 cup (250 ml) of lukewarm water.

4. Let dry.

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Stains caused by candy, ice cream, mayonnaise, chili sauce and unknown stains can be removed as follows: 1. Carefully scrape off excess stain. 2. First, clean with cool water and allow to

dry completely.

3. If a stain remains, follow the cleaner instructions

described earlier. Cleaning Vinyl Use warm water and a clean cloth. D Rub with a clean, damp cloth to remove dirt. You

may have to do it more than once.

D Things like tar, asphalt and shoe polish will stain

if you don’t get them off quickly. Use a clean cloth and a vinyl/leather cleaner. See your dealer for this product.

Cleaning 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. D For stubborn stains, use a leather cleaner. See your

dealer for this product.

D Never use oils, varnishes, solvent-based or abrasive cleaners, furniture polish or shoe polish on leather.

D Soiled or stained leather should be cleaned

immediately. If dirt is allowed to work into the finish, it can harm the leather.

Cleaning the 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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Cleaning Interior Plastic Components Use only a mild soap and water solution on a soft cloth or sponge. Commercial cleaners may affect the surface finish. 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.

Cleaning 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 “Appearance Care and Materials” in the Index.

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.

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Cleaning the Outside of the 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. 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 “Recommended Fluids and Lubricants” in the Index.

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 “Appearance Care and Materials” in the Index. 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 QUADRASTEER see “Car Washes” in the Index.

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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 “Appearance Care and Materials” in the Index. 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 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. 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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Cleaning Aluminum or Chrome-Plated Wheels (If Equipped) 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 silicon carbide tire cleaning brushes. These brushes can also damage the surface of these wheels.

Cleaning Tires To clean your tires, use a stiff brush with a 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 the parts repaired or replaced to restore corrosion protection. Original manufacturer replacement parts will provide the corrosion protection while maintaining the warranty.

6-73

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. This applies only to materials manufactured and sold by General Motors. Bodies, body conversions or equipment not made or sold by General Motors are not covered.

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 a major repair expense. Minor chips and scratches can be repaired with touch-up materials available from your dealer or other service outlets. Larger areas of finish damage can be corrected in your dealer’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, 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 other debris can collect. Dirt packed in closed areas of the frame should be loosened before being flushed. Your dealer or an underbody car washing system can do this for you.

6-74

GM Vehicle Care/Appearance Materials

6-75

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’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.

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 on the inside of the glove box. It’s very helpful if you ever need to order parts. On this label is: D your VIN, D the model designation, D paint information and D a list of all production options and

special equipment.

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

6-76

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” in the Index. Windshield Wipers 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.

6-77

Instrument Panel Fuse Block

The fuse block access door is on the driver’s side edge of the instrument panel. Pull off the cover to access the 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.

6-78

Fuse HVAC 1
IGN 3
BRAKE HTR A/C IGN 0

Usage Climate Control System Ignition, Power Seats Anti-Lock Brake System Climate Control System PRND321 Display, Odometer, PCM

Fuse CRUISE

4WD

TURN

RR WIPER WS WPR SEO IGN

ILLUM IGN 1
SEO ACCY

L BODY CRANK

Usage Cruise Control, Instrument Panel Cluster Four-Wheel Drive System, Auxiliary Battery Exterior Lamps, Turn Signals, Hazard Lamps Not Used Windshield Wipers Special Equipment Option, Ignition, Manual Selectable Ride Interior Lamps Ignition, Instrument Panel Special Equipment Option Accessory, Cellular Telephone Retained Accessory Power Relay Starting System

Usage Air Bag Power Mirrors, Power Door Locks Power Seat Circuit Breaker Power Door Locks Retained Accessory Power Relay Power Door Locks Interior Lamps Power Door Locks

Fuse AIR BAG MIR/LOCK SEAT DR LOCK RAP #1
LOCK INT PRK UNLOCK DRV UNLOCK Power Door Lock Relay L DOOR Power Door Lock Relay Power Window Circuit Breaker PWR WDO Audio System RDO 1
RAP #2
Not Used Power Door Lock Relay LOCK UNLOCK Power Door Lock Relay

6-79

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

Relay Name SEO HTD ST SPARE 4
VANITY TRAILER PWR ST SPARE 5
CLUTCH

Usage Special Equipment Option Heated Seats Not Used Headliner Wiring Trailer Brake Wiring Power Seats Not Used Manual Transmission Clutch Switch Upfitter Parking Lamps (Relay)

UPF PARK LAMP FRT PRK EXPT Not Used (Fuse) SL RIDE SPARE 2
RR PRK LP RR FOG LP SPARE 3
INADV PWR CTSY LP CEL PHONE

Manual Selectable Ride Switch Not Used Not Used (Relay) Not Used (Relay) Not Used Interior Lights Feed Courtesy Lamps Cellular Telephone Wiring

6-80

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. Once you remove the cover, you will see some fuses to the top right of the fuse/relay block. These are spare fuses and can be used accordingly. You can remove fuses with a fuse extractor. The fuse extractor is located in the underhood electrical center. 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. See “Engine Compartment Overview” in the Index for more information on its location.

6-81

6-82

*1 INJ B--Gasoline Engine and Diesel Engine. *2 ECM I--Gasoline Engine; ECMRPV--Diesel Engine. *3 02 A--Gasoline Engine; FUEL HT--Diesel Engine. *4 02 B--Gasoline Engine; ECM I--Diesel Engine. Fuse GLOW PLUG

Usage Diesel Glow Plugs and Intake Air Heater Gasoline Accessory Power Accessory Power/Trailer Wiring Feed Anti-Lock Brakes Ignition Switch A.I.R. System Retained Accessory Power, Power Mirrors, Power Door Locks, Power Seat(s) Ignition Switch Not Used Accessory Power/Trailer Wiring Brake Feed Spare Fuse

CUST FEED STUD #1

ABS IGN A AIR RAP #1

IGN B RAP #2
STUD #2

SPARE

Fuse TRL R TRN TRL L TRN IGN 1
INJ B STARTER PARK LP FRT HVAC STOP LP ECM I ECMRPV CHMSL VEH STOP TRL B/U INJ A RR HVAC VEH B/U ENG 1

ETC IGN E

Usage Right Turn Signal Trailer Wiring Left Turn Signal Trailer Wiring Ignition, Fuel Controls (Relay) Ignition, Fuel Controls Starter (Relay) Parking Lamps Climate Control System Exterior Lamps, Stoplamps PCM Fuel Controls, ECM Center High Mounted Stoplamp Stoplamps, Cruise Control Backup Lamps Trailer Wiring Fuel Controls, Ignition Not Used Vehicle Backup Lamps Engine Controls, Canister Purge, Fuel System Electronic Throttle Control A/C Compressor Relay, Rear Window Defogger, Daytime Running Lamps, A.I.R. System

6-83

Usage Backup Lamps, Automatic Transmission Shift Lock Control System Automatic Transfer Case Rear Window Defogger, Heated Mirrors (Relay) Right Rear Parking Lamps PCM Fuel Pump (Relay) Oxygen Sensors Fuel Heater, Glow Plug and Intake Heater Controls Oxygen Sensors Left Rear Parking Lamps Rear Window Defogger, Heated Mirrors Headlamps (Relay) Parking Lamps Trailer Wiring Right Headlamps Daytime Running Lamps (Relay) Heated Mirrors

Fuse LT HDLP A/C AUX PWR

SEO 2

SEO 1

DRL A/C FOG LP FOG LP RADIO

CIGAR

RT TURN BTSI

LT TURN FR PRK

Usage Left Headlamps Air Conditioning Cigarette Lighter, Auxiliary Power Outlets Special Equipment Option Power, Power Seats, Aux Roof Mnt Lamp Special Equipment Option Power, Aux Roof Mnt Lamp, Cell Phone, OnStarR Daytime Running Lamps A/C (Relay) Fog Lamps Fog Lamps (Relay) Audio System, Instrument Cluster, Climate Control System Cigarette Lighter, Auxiliary Power Outlets Right Turn Signals Automatic Transmission Shift Lock Control System Left Turn Signals Front Parking Lamps, Sidemarker Lamps

Fuse B/U LP

ATC RR DEFOG

RR PRK ECM B F/PMP O2 A FUEL HT

O2 B LR PRK RR DEFOG

HDLP TRL PRK RT HDLP DRL HTD MIR

6-84

Fuse W/W PMP HORN IGN C

RDO AMP HAZ LP EXP LPS HORN CTSY LP RR WPR TBC

Usage Windshield Washer Pump Horn (Relay) Ignition Switch, Fuel Pump, PRND321 Display, Crank Not Used Exterior Lamps, Hazard Lamps Not Used Horn Interior Lamps Not Used Body Control Module, Remote Keyless Entry, Headlamps

Quantity

Replacement Bulbs Lamps Low-Beam Headlamps High-Beam Headlamps Daytime Running Lamps (DRL)

Number

9006
9005

4157K

Lamps Front Roof Marker Lamps Front Parking and Turn Lamp Rear Marker Lamp, Taillamp and Stop Lamp Taillamp and Stop Lamp** Rear Turn Lamp Rear Turn Lamp ** Back-up Lamp Back-up Lamp ** Center High-Mounted Stoplamp Cargo Lamp Fender Marker Lamps

Quantity

Number

194

3157 A

3157

1157

3157
1156
3157
1156
912

912
194

* For any bulb not listed here, contact your dealer. ** Chassis Cab Models

6-85

Capacities and Specifications Please refer to “Recommended Fluids and Lubricants” in the Index for more information. All capacities are approximate. When adding see the refrigerant charge label under the hood for charge capacity information and requirements.

Engine VORTEC 4300
VORTEC 4800
VORTEC 5300
VORTEC 6000
VORTEC 6600
VORTEC 8100

Wheels and Tires Model C/K 1500 & C/K 2500

C/K 3500

Tire Pressure

6-86

Type V6
V8
V8
V8
V8
V8

VIN Code

Spark Plug Gap 0.060 inches (1.52 mm) 0.060 inches (1.52 mm) 0.060 inches (1.52 mm) 0.060 inches (1.52 mm) 0.060 inches (1.52 mm) 0.060 inches (1.52 mm)

Description 6 bolts (14 mm)

8 bolts (14 mm)

Torque 140 lb-ft (190 N·m) 140 lb-ft (190 N·m)

See the Certification/Tire label on the rear edge of the driver’s door or the incomplete vehicle document in the cab.

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

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

Transmission Automatic Manual Automatic Manual Automatic Automatic Automatic Automatic Manual Manual Manual Automatic

* Vehicles equipped with the optional engine oil cooler. ** Vehicles equipped with the optional air conditioner.

Quantity 12.6 quarts (11.9 L) 12.9 quarts (12.2 L) 13.4 quarts (12.7 L) 13.7 quarts (13.0 L) 13.4 quarts (12.7 L) 14.9 quarts (14.1 L) 14.8 quarts (14.0 L) 14.4 quarts (13.6 L) 15.2 quarts (14.4 L) 14.8 quarts (14.0 L) 21.1 quarts (20.0 L) 20.7 quarts (19.6 L)

6-87

Engine Oil with Filter Capacity After refill, the level must be rechecked. Add enough engine oil so that the fluid is within the proper operating range. See “Engine Oil” in the Index.

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

VIN

Quantity with Filter[ 4.5 quarts (4.3 L) 6.0 quarts (5.7 L) 6.0 quarts (5.7 L) 6.0 quarts (5.7 L) 6.5 quarts (6.1 L)

[Oil filter should be changed at every oil change.

6-88

Fuel Tank Capacity Type Short Bed Long Bed Chassis Cab (Pickup Box Delete) Chassis Cab 3500 27.0 U.S. gallons (102 L) (front)

Quantity 26.0 U.S. gallons (98 L) 34.0 U.S. gallons (128 L) 34.0 U.S. gallons (128 L)

23.0 U.S. gallons (87 L) (rear) 24.0 U.S. gallons (90 L) (front)

Chassis Cab 3500
(California)

23.0 U.S. gallons (87 L) (rear)

Chassis Cab 3500 27.0 U.S. gallons (102 L) (front) 27.0 U.S. gallons (102 L) (front) Chassis Cab 3500
(California) Chassis Cab 3500HD

23.0 U.S. gallons (87 L) (front)

18.0 U.S. gallons (68 L) (rear) 23.0 U.S. gallons (87 L) (front)

Chassis Cab 3500HD

Air Conditioning Refrigerant Capacity If you do your own service work, you’ll need the proper service manual. See “Doing Your Own Service Work” in the Index for additional information. It is recommended that service work on your air conditioning system be performed by a qualified technician. Air Conditioning

Refrigerant R-134a

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

1.76 lbs (0.8 kg)

Use Refrigerant Oil, R134a Systems

6-89

Normal Maintenance Replacement Parts Replacement part numbers listed in this section are based on the latest information available at the time of printing, and are subject to change. If a part listed in this manual is not the same as the part used in your vehicle when it was built, or if you have any questions, please contact your GM dealer. These specifications are for information only. If you have any questions, see the service manual for the chassis or refer to the body manufacturer’s publications. VIN Code Oil Filter* Engine Air Cleaner/Filter* A1519C[ Passenger Compartment 52485513
Air Filter Kit** PCV Valve* Spark Plugs

PF454
A1518C 52485513

A1518C 52485513

A1519C[ 52485513

A1519C[ 52485513

PF47

PTJ14R15***[[

CV948C

CV948C

CV948C

PF59

PF59

PF59

CV769C 41-932*

PTJ14R15*** /PZTR5A15[[

PTJ14R15*** /PZTR5A15[[

PTZ16R15*** /PZTR5A15[[

Fuel Filter* Wiper Blades** Wiper Blade Type Wiper Blade Length

*ACDelcoR part number **GM part number ***Denso part number

6-90

GF626

15153642

ITTA

22 inches (56.0 cm)

GF626

15153642

ITTA

22 inches (56.0 cm)

GF626

15153642

ITTA

22 inches (56.0 cm)

GF626

15153642

ITTA

22 inches (56.0 cm)

GF626

15153642

ITTA

22 inches (56.0 cm)

[A1518C high-capacity air cleaner filter may

be substituted.

[[ NGK part number

Section 7 Maintenance Schedule

This section covers the maintenance required for your vehicle. Your vehicle needs these services to retain its safety, dependability and emission control performance.

7-2 7-4 7-5 7-18

Introduction Part A: Scheduled Maintenance Services Scheduled Maintenance Part B: Owner Checks and Services

7-24 7-26 7-29

Part C: Periodic Maintenance Inspections Part D: Recommended Fluids and Lubricants Part E: Maintenance Record

7-

7-1

Introduction 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.

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.

7-2

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 qualified service center do these jobs.

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, have a qualified technician do the work.

If you want to get the service information, see “Service and Owner Publications” in the Index.

“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.

7-3

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: D carry passengers and cargo within recommended limits. You will find these limits on your vehicle’s Certification/Tire label. See “Loading Your Vehicle” in the Index.

D are driven on reasonable road surfaces within legal

driving limits.

D are driven off-road in the recommended manner. See

“Off-Road Driving With Your Four-Wheel-Drive Vehicle” in the Index.

D use the recommended fuel. See “Fuel” in the Index.

Part A: Scheduled Maintenance Services 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. This part tells you the maintenance services you should have done and when you should schedule them. If 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.

7-4

Scheduled Maintenance

The services shown in this schedule up to 100,000 miles (166 000 km) should be repeated after 100,000 miles (166 000 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 intervals after 150,000 miles (240 000 km) and 200,000 miles (332 000 km) for the life of this vehicle. See “Owner Checks and Services” and “Periodic Maintenance Inspections” following.

Footnotes [ 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” under “Periodic Maintenance Inspections” in Part C of this schedule.

7-5

Scheduled Maintenance

Engine Oil and Chassis Lubrication Scheduled Maintenance Change engine oil and filter as indicated by the GM Oil Life Systemt (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. 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 “Oil Life System” in the Index for information on resetting the system. An Emission Control Service. Lubricate chassis components with each engine oil and filter change. Lubricate the front suspension, ball joints, steering linkage, transmission shift linkage, transfer case 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.

7-6

Scheduled Maintenance

7-7

Scheduled Maintenance

7-8

Scheduled Maintenance

7,500 Miles (12 500 km) j Check rear/front axle fluid level and add fluid as needed. Check constant

velocity joints and axle seals for leaking.

j Rotate tires. See “Tire Inspection and Rotation” in the Index for proper

rotation pattern and additional information. (See footnote +.)

DATE

ACTUAL MILEAGE

SERVICED BY:

15,000 Miles (25 000 km) j If Equipped: Replace passenger compartment air filter. If you drive regularly

under dusty conditions, the filter may require replacement more often.

DATE

ACTUAL MILEAGE

SERVICED BY:

j Check rear/front axle fluid level and add fluid as needed. Check constant

velocity joints and axle seals for leaking.

j Rotate tires. See “Tire Inspection and Rotation” in the Index for proper

rotation pattern and additional information. (See footnote +.)

22,500 Miles (37 500 km) j Check rear/front axle fluid level and add fluid as needed. Check constant

velocity joints and axle seals for leaking.

j Rotate tires. See “Tire Inspection and Rotation” in the Index for proper

rotation pattern and additional information. (See footnote +.)

DATE

ACTUAL MILEAGE

SERVICED BY:

7-9

Scheduled Maintenance

25,000 Miles (41 500 km) j 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. – 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 every 50,000 miles (83 000 km).

DATE

ACTUAL MILEAGE

SERVICED BY:

30,000 Miles (50 000 km) j If Equipped: Replace passenger compartment air filter. If you drive regularly

under dusty conditions, the filter may require replacement more often.

DATE

ACTUAL MILEAGE

SERVICED BY:

j Check rear/front axle fluid level and add fluid as needed. Check constant

velocity joints and axle seals for leaking.

j Rotate tires. See “Tire Inspection and Rotation” in the Index for proper

rotation pattern and additional information. (See footnote +.)

j Replace fuel filter.

An Emission Control Service. (See footnote [.)

7-10

Scheduled Maintenance

37,500 Miles (62 500 km) j Check rear/front axle fluid level and add fluid as needed. Check constant

velocity joints and axle seals for leaking.

j Rotate tires. See “Tire Inspection and Rotation” in the Index for proper

rotation pattern and additional information. (See footnote +.)

DATE

ACTUAL MILEAGE

SERVICED BY:

45,000 Miles (75 000 km) j If Equipped: Replace passenger compartment air filter. If you drive regularly

under dusty conditions, the filter may require replacement more often.

DATE

ACTUAL MILEAGE

SERVICED BY:

j Check rear/front axle fluid level and add fluid as needed. Check constant

velocity joints and axle seals for leaking.

j Rotate tires. See “Tire Inspection and Rotation” in the Index for proper

rotation pattern and additional information. (See footnote +.)

7-11

Scheduled Maintenance

50,000 Miles (83 000 km) j Change automatic transmission fluid and filter if the vehicle’s GVWR is over 8600 lbs., 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).

j Automatic Transfer Case Only: Change transfer case fluid.

DATE

ACTUAL MILEAGE

SERVICED BY:

52,500 Miles (87 500 km) j Check rear/front axle fluid level and add fluid as needed. Check constant

velocity joints and axle seals for leaking.

j Rotate tires. See “Tire Inspection and Rotation” in the Index for proper

rotation pattern and additional information. (See footnote +.)

DATE

ACTUAL MILEAGE

SERVICED BY:

7-12

Scheduled Maintenance

60,000 Miles (100 000 km) j If Equipped: Replace passenger compartment air filter. If you drive regularly

under dusty conditions, the filter may require replacement more often.

DATE

ACTUAL MILEAGE

SERVICED BY:

j Check rear/front axle fluid level and add fluid as needed. Check constant

velocity joints and axle seals for leaking.

j Rotate tires. See “Tire Inspection and Rotation” in the Index for proper

rotation pattern and additional information. (See footnote +.)

j Inspect engine accessory drive belt.

An Emission Control Service.

j Replace fuel filter.

An Emission Control Service. (See footnote [.)

j 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 [.)

67,500 Miles (112 500 km) j Check rear/front axle fluid level and add fluid as needed. Check constant

velocity joints and axle seals for leaking.

j Rotate tires. See “Tire Inspection and Rotation” in the Index for proper

rotation pattern and additional information. (See footnote +.)

DATE

ACTUAL MILEAGE

SERVICED BY:

7-13

Scheduled Maintenance

75,000 Miles (125 000 km) j If Equipped: Replace passenger compartment air filter. If you drive regularly

under dusty conditions, the filter may require replacement more often.

DATE

ACTUAL MILEAGE

SERVICED BY:

j Check rear/front axle fluid level and add fluid as needed. Check constant

velocity joints and axle seals for leaking.

j 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