1995 GMC Sierra Owners Manual

screws from the headlamp retainer.

2. Pull the headlamp

out and remove the retainer.

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3. Unplug and remove the headlamp.

4. Plug in the new

headlamp and put it in place. 5. Install the

retainer to the headlamp and tighten the screws.

Halogen Bulbs A CAUTION:

Halogen bulbs have pressurized gas inside and can burst drop or scratch the bulb. You or others could be injured. Take special care when handling and disposing of halogen bulbs.

if you

NOTICE: Avoid touching the bulb or letting it come in contact with anything damp. Oil from your skin or moisture on the bulb can cause the bulb to explode when it contact with the bulb, clean it with alcohol or degreaser and wipe the bulb dry.

is turned on. If either comes in

a suitable

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Composite Headlamps

1. Remove the two screws at the top of the radiator support.

2. Pull the headlamp

lens assembly out.

1 3. Unplug the

electrical connector.

4. TLH-II the bulb to

the left and remove it.

5. Put the new bulb in the lens assembly and turn it to the right until it is

tight.

6. Plug in the electrical connector. 7. Put the headlamp lens assembly back into the vehicle. Install and

tighten the two screws.

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Front Parkingnurn Signal Lamps with Sealed Beam Headiamps

1. Remove the two

screws at the inside edge of the parkinghrn signal lamp assembly.

2. Remove the lamp assembly by swinging it out from the inside edge and

sliding it out at the outside edge.

3. Squeeze the tab on the side of the lamp socket while turning the socket to the left.

4. Pull the socket out of the lamp assembly.

5. Push in gently on the bulb, turn it t o the left and remove it from the

socket.

6. Put the new bulb in the socket, gently press in on the bulb and turn it to

the right until it is tight.

7. Put the socket back into the lamp assembly and turn it to the right until

it locks.

8. Put the parking/turn signal lamp assembly back inlo the vehicle and

tighten the screws.

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Front Parkingflurn Signal Lamps with Composite Headlamps

1. Remove the

screws and take out the parkinghum signal lamp assembly.

2. Squeeze the tab on the side of the lamp socket while turning the socket to the left.

3. Pull the socket out: of the lamp assembly.

4. Push in gently on the bulb, turn it to the left and remove it from the socket.

5. Put the new bulb in the socket, gently press in on the bulb and turn it to

the right until it is tight.

6. Put the socket back into the lamp assembly and turn it socket to the

right until it locks.

7. Put the parkinghurn signal lamp assembly back into the vehicle and

tighten the screws.

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Side Marker Lamps with Sealed Beam and Composite Headlamps

1. Remove the

screws and pull out the parkinghum signal lamp assembly.

2. Reach through

the opening and turn the side marker bulb socket to the left and remove it.

3. Pull the bulb

straight out of the socket.

4. Put a new bulb into the socket and push it in until it is tight.

5. Put the socket back into the side marker assembly and

turn it to the

right to tighten it.

6. Replace the parking/turn signal lamp assembly and tighten the screws.

6-52

Fender Marker Lamps - Dual Rear Wheel Pickup Models

4 screws and take

1. Remove the

er

the fender mark assembly out of the fender.

I 2. Turn the bulb socket to the left and remove it from the lens assembly.

3. Pull the bulb

straight out of the socket.

3. Put a new bulb into the socket and push it in until it is tight. 5. Put the socket back into the lens assembly and turn it to the right to

tighten it.

6. Replace the lens and tighten the screws.

Tailgate Marker Lamps I. Use a screwdriver to gently pry the lens/bulb assembly from the lens

holder.

2. Unplug the lens/bulb assembly at the connector wire. 3. Plug in a new lens/bulb assembly and push the connector wire into the

hole in the tailgate.

4. Snap the lens/bulb assembly into the lens holder.

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Roof Marker Lamps

1. Remove the screws and lift off the lens. 2. Pull the bulb straight out of the socket. 3. Put a new bulb into the socket and push it in until it is tight. 4. Replace the lens and tighten the screws.

Cargo LampKenter High Mount Stoplamp (CHMSL)

1. Remove the

screws and lift off the lens.

2. Pull the old bulb straight out of the socket.

.. . . .

LI

3. Put a new bulb into the socket and push it in until it is tight.

4. Replace the lens

and tighten the screws.

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Rear Lamps - Pickup Models

1. Open the tailgate. 2. Remove the two

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

3. Remove the

screws from the bulb retainer and take it off the lamp assembly.

4. Pull the old bulb straight out of the socket.

5. Put in a new bulb

and push it in until it is tight. 6. Replace the bulb

retainer.

7. Replace the rear lamp assembly and tighten the screws. 8. Close the tailgate.

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Rear Lamps - Chassis Cab Models

1. Using your

hands, peel the rubber seal away from the lens. 2. Lift the lens off

the lamp assembly.

3. Slide the socket out of the lamp assembly.

4. Push in gently on the bulb, turn it to the left and remove it from the socket.

5. Put in a new bulb

and, pushing in gently, turn it to the right until it is tight.

6. Put the socket back i n the lamp assembly and replace the lens and lens

seal.

Exhaust System To help prevent damage to your exhaust system, do not continue to drive your vehicle if you notice:

0 Engine misfiring 0 Loss of performance 0 Exhaust system components hanging lower than normal 0 Loud exhaust system noises 0 Other unusual operating conditions

Have your engine and exhaust system serviced regularly.

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Three- Way Catalytic Converter (Gasoline Engines) Your vehicle’s three-way catalytic converter is designed to reduce the pollutants in your vehicle‘s exhaust. Use only unleaded fuel in your vehicle. If you use leaded fuel, you could damage your three-way catalytic converter and other engine components.

Oxidation Catalytic Converter (Diesel Engines) Your vehicle’s oxidation catalytic converter is designed to reduce the particulates in your vehicle‘s exhaust. If your vehicle’s oxidation catalytic converter ever needs to be replaced, it must be replaced with an oxidation converter intended for use with diesel engines only.

Engine Control Module System

Gasoline Engines This system has an oxygen sensor (OS) that helps keep your engine’s air-fuel mixture at a proper level. Use only unleaded fuel in your vehicle. If you use leaded fuel, you could damage your oxygen sensor (OS) and three-way catalytic converter.

Diesel Vehicles Below 8,500 (3 850 Kg) G VWR This system monitors engine speed and throttle position. It adjusts exhaust gas recirculation to limit emissions.

Malfunction Indicator (SERVICE ENGINE SOON) Light The Malfunction Indicator (SERVICE ENGINE SOON) Light on your instrument panel lets you know when your emission system needs service. The light will come on briefly when you start your engine to let you know that the system is working. If it does not come on when you start your engine, or if it comes on and stays on while you’re driving, your system may need service. Your vehicle should still be driveable, but you should have your system serviced right away. Secondary Air Injection Reaction (AIR) System (Gasoline Engines) You may have this system. It has a control valve that will direct air to where it is needed. If the AIR system needs service, your Malfunction Indicator (SERVICE ENGINE SOON) Lamp on your instrument panel will come on.

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Tires We don’t make tires. Your new vehicle comes with high-quality tires made by a leading tire manufacturer. These tires are warranted by the tire manufacturers, and their warranties are delivered with every new vehicle. If your spare tire is a different brand than your road tires, you will have a tire warranty folder from each of these manufacturers.

A CAUTION:

Poorly maintained and improperly used tires are dangerous.

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. 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. 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. Worn, old tires can cause accidents. If your tread is badly worn, or if your tires have been damaged, replace them.

Inflation - Tire Pressure The Certification/Tire label which is on the rear edge of the driver‘s door, or on the incomplete vehicle document in the cab, shows the correct inflation pressures for your tires, when they’re cold. “Cold“ tneans your vehicle has been sitting for at least three hours or driven no more than a mile. You can operate some vehicles at reduced inflation pressures only when you’ll be carrying reduced loads. On those vehicles, the minimum cold inflation pressures for a typical reduced load are printed on the “Improved Ride Tire Pressure” label located on the driver’s door. Weigh the vehicle to find the load on each tire and see the label for the minimum cold inflation pressures for that load.

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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: 0 Too much flexing

Too much heat 0 Tire overloading

Bad wear Bad handling

0 Bad fuel economy. If your tires have too much air (overinflation), you can get:

Unusual wear Bad handling Rough ride 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. Simply looking at the tires will not tell you the pressure, especially if you have radial tires - which may look properly inflated even if they’re underinflated. If your tires have valve caps, be sure to put them back on. They help prevent leaks by keeping out dirt and moisture.

Tire Inspection and Rotation Tires should be inspected every 6,000 to 8,000 miles (10 000 to 13 000 km) for any signs of unusual wear. If unusual wear is present, 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. If your vehicle has dual rear wheels, also see “Dual Tire Operation” later in this section.

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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.

FRT

I I I

FRT

If your vehicle has single rear wheels, always use one of the correct rotation patterns shown here when rotating your tires. If your vehicle has front tires with different load ranges o r tread designs (such as all season vs. on/off road) than the rear tires. don‘t rotate your tires front to rear.

W v

If your vehicle has dual rear wheels and the load range and 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.

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or tread design for

If your vehicle has dual rear wheels and the load range your front tires is different from your rear tires, always use 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 Certificatioflire label. Make certain that all wheel nuts are properly tightened. See “Wheel Nut Torque” in the Index.

the correct

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When it’s Time for New Tires

Tread Wear Indicators 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.

You need a new tire if:

0 You can see the indicators at three or more places around the tire. 0 You can see cord or fabric showing through the tire’s rubber.

The tread or sidewall is cracked, cut or snagged deep enough to show cord or fabric. The tire has a bump, bulge or split. The tire has a puncture, cut, or other damage that can‘t be repaired well because of the size or location of the damage.

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.

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A 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, if any) are properly inflated.

Buying New Tires To find out what kind and size of tires you need, look at the CertificationRire label. The tires installed on your vehicle when it was new 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.

I A 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. Be sure to use the same size and type tires on all four wheels.

Uniform Tire Quality Grading 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.)

6-63

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 - A, B, C The traction grades, from highest to lowest are: A, B, and C. They 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 braking (straight-ahead) traction tests and does not include cornering (turning) traction. 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. These grades are molded on the sidewalls of passenger car tires. While the tires available as standard or optional equipment on General Motors vehicles may vary with respect to these grades, all such tires meet General Motors performance standards and have been approved for use on General Motors vehicles. All passenger type (P Metric) tires must conform to Federal safety requirements in addition to these grades.

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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. In most cases, you will not need to have your wheels aligned again. 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 GM 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. A 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.

NOTICE: The wrong wheel can also cause problems with bearing life, brake cooling, speedometer/odometer calibration, headlamp aim, bumper height, vehicle ground clearance, and tire or tire chain clearance to the body and chassis.

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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.

Used Replacement Wheels

A CAUTION:

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

‘ire Chains

NOTICE: If your vehicle has dual wheels or LT265/75R16 size tires, don’t use tire chains; they can damage your vehicle. If you don’t have dual wheels or if you have a tire size other than LT26975R16, 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.

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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:

Gasoline Benzene Naphtha

0 Carbon Tetrachloride ’ 0 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. 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

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C/eaning the Inside of Your Vehicle Use a vacuum cleaner often to get rid of dust and loose dirt. Wipe vinyl or leather with a clean, damp cloth. Your GM dealer has two CM cleaners, a solvent-type spot lifter and a foam-type powdered cleaner. They will clean normal spots and stains very well. Do not use them on vinyl or leather. Here are some cleaning tips:

Always read the instructions on the cleaner label. Clean up stains as soon as you can - before they set.

0 Use a clean cloth or sponge, and change to a clean area often. A soft

brush may be used if stains are stubborn.

0 Use solvent-type cleaners in a well-ventilated area only. If you use

them, don‘t saturate the stained area.

0 If a ring forms after spot cleaning, clean the entire area immediately or

it will set.

Using Foam-Type Cleaner on Fabric

Vacuum and brush the area to remove any loose dirt. Always clean a whole trim panel or section. Mask surrounding trim along stitch or welt lines. Mix Multi-Purpose Powdered Cleaner following the directions on the container label. Use suds only and apply with a clean sponge. Don’t saturate the material. Don’t rub it roughly. As soon as you’ve cleaned the section, use a sponge to remove the suds. Rinse the section with a clean, wet sponge. Wipe off what’s left with a slightly damp paper towel or cloth. Then dry it immediately with a blow dryer or a heat lamp.

NOTICE: Be careful. A blow dryer may scorch the fabric.

~~

0 Wipe with a clean cloth.

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Using Solvent-Type Cleaner on Fabric First, see if you have to use solvent-type cleaner at all. Some spots and stains will clean off better with just water and mild soap. If you need to use a solvent:

Gently scrape excess soil from the trim material with a clean, dull knife or scraper. Use very little cleaner, light pressure and clean cloths (preferably cheesecloth). Cleaning should start at the outside of the stain, “feathering” toward the center. Keep changing to a clean section of the cloth. When you clean a stain from fabric, immediately dry the area with a blow dryer to help prevent a cleaning ring. (See the previous NOTICE.)

Fabric Protection Your vehicle has upholstery and carpet that has been treated with Scotchgard TM Fabric Protector, a 3M product. Scotchgard TN protects fabrics by repelling oil and water, which are the carriers of most stains. Even with this protection, you still need to clean your upholstery and carpet often to keep it looking new. Further information on cleaning is available by calling 1-800-433-3296 Minnesota, 1-800-642-6 167).

(in

Special Cleaning Problems

Greasy or Oily Stains Stains caused by grease, oil, butter, margarine, shoe polish, coffee with cream, chewing gum, cosmetic creams, vegetable oils, wax crayon, tar and asphalt can be removed as follows:

Carefully scrape off excess stain. Follow the solvent-type instructions described earlier. Shoe polish, wax crayon, tar and asphalt will stain if left on a vehicle seat fabric. They should be removed as soon as possible. Be careful, because the cleaner will dissolve them and may cause them to spread.

Non-Greasy Stains Stains caused by catsup, coffee (black), egg, fruit, fruit juice, milk, soft drinks, wine, vomit, urine and blood can be removed as follows:

Carefully scrape off excess stain, then sponge the soiled area with cool water. If a stain remains. follow the foam-type instructions described earlier.

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If an odor lingers after cleaning vomit or urine, treat the area with a waterhaking soda solution: I teaspoon ( 5 ml> of baking soda to 1 cup (250 ml) of lukewarm water. If needed, clean lightly with solvent-type cleaner.

Combination Stains Stains caused by candy, ice cream, mayonnaise, chili sauce and unknown stains can be removed as follows:

0 Carefully scrape off excess stain, then clean with cool water and allow

to dry.

0 If a stain remains, clean it with solvent-type cleaner. Cleaning Vinyl Use warm water and a clean cloth.

0 Rub with a clean, damp cloth to remove dirt. You may have to do it

more than once.

0 Things like tar, asphalt and shoe polish will stain if you don’t get them

off quickly. Use a clean cloth and GM vinyMeather cleaner.

Cleaning Leather Use a soft cloth with lukewarm water and a mild soap or saddle soap.

For stubborn stains, use GM vinylheather cleaner. Never use oils, varnishes, solvent-based or abrasive cleaners, furniture polish or shoe polish on leather.

0 Soiled leather should be cleaned immediately. If dirt is allowed to work

into 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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Care of Safety Belts Keep belts clean and dry.

A CAUTION:

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

do, it may severely

Glass Glass should be cleaned often. GM Glass Cleaner (GM Part No. 1050427) or a liquid household glass cleaner will remove normal tobacco smoke and dust films. 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. 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 or other material may be on the blade or windshield. Clean the outside of the windshield with GM Windshield Cleaner, Bon-Ami Powder@ (GM Part No. 105001 1). The windshield is clean if beads do not form when you rinse it with water. Clean the blade by wiping vigorously with a cloth soaked in full strength windshield washer solvent. Then rinse the blade with water. Wiper blades should be checked on a regular basis and replaced when 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.)

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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. Don’t use strong soaps or chemical detergents. Use liquid hand, dish or car washing (mild detergent) soaps. 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 o r a 100% cotton towel to avoid surface scratches and water spotting. High pressure car washes may cause water to enter 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 GM manufactured vehicle may have a ‘‘base~~at/~learcoat” 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. 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.

6-72

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 GM 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. Aluminum Wheels (If So Equipped) Your aluminum wheels have a protective coating similar surface of your vehicle. Don’t use strong soaps, chemicals, chrome polish, abrasive cleaners or abrasive cleaning brushes on them because you could damage this coating. After rinsing thoroughly, a wax may be applied.

to the painted

I NOTICE:

If you have aluminum wheels, don’t use an automatic car wash that has hard silicon carbide cleaning brushes. These brushes can take the protective coating off your aluminum wheels.

Tires To clean your tires, use a stiff brush with a tire cleaner. When applying a tire dressing always take care to wipe off any overspray or splash from painted surfaces. Petroleum-based products may damage the paint finish. Sheet Metal Damage replacement, If your vehicle is damaged and requires sheet metal repair or make sure the body repair shop applies anti-corrosion material to the parts repaired or replaced to restore corrosion protection. Foreign Material Calcium chloride and other salts, ice melting agents, sap, bird droppings, chemicals from industrial chimneys, and other foreign matter can damage your vehicle’s finish Use cleaners that are marked safe for painted surfaces matter.

if they remain on painted surfaces.

road oil and tar, tree

to remove foreign

6.- 73

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 vehicle 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 comes 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.

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Appearance Care Materials Chart

PART NO. 1050172

SIZE

16 oz. (0.473L)

PRODUCT Tar and Road Oil Remover

USAGE Removes old waxes, polishes, tar and road oil

1050173

16 oz. (0.473L)

Chrome Cleaner Removes rust and Polish

and corrosion on chrome and stainless steel Cleans white and black tires Spot and stain removal on leather or vinyl Spot and stain removal on cloth and fabric Glass cleaning and spot cleaning on vinyls Cleans vinyl and cloth on door trim, seats, and carpet-also tires and mats. Cleaning of vinyl tops Vinyl top dressing Spot and stain removal on cloth and fabric Exterior wash

Exterior cleaner and polish

1050 174

16 oz. (0.473L)

10502 14

32 oz. (0.946L)

White Sidewall Tire Cleaner Vinyl Leather Cleaner

1050244

16 oz. (0.473L)

Fabric Cleaner

1050427

23 oz. (0.680L)

Glass Cleaner

1050429

6 Ibs. (2.72 kg)

Multi-Purpose Powder Cleaner

1050729

8 oz. (0.237L)

1051055

16 oz. (0.473L)

Vinyl Top Cleaner Preservatone

1051398

8 oz. (0.237L)

Spot Lifter

1052870

16 oz. (0.473L)

105020 1

16 oz. (0.473L)

Wash-Wax (conc .) Magic Mirror Cleaner-Polish

6-75

Vehicle Identification Number (VIN)

0 TESTVNXX3XXQ09696 G

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 ldentificafion The eighth character in your VIN is the engine code. This code will help you identify your engine, specifications. and replacement parts.

6-76

31 I

00

W f

6-77

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:

your VIN, the model designation, 0 paint information, and

a list of all production options and special equipment.

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

6-78

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 in the wiring itself. This greatly reduces the chance of fires caused by electrical problems. See “Fuses and Circuit Breakers’’ in the Index for more information.

Headlamps The headlamp wiring is protected by a circuit breaker in the lamp switch. An electrical overload will cause the lamps to flicker on and off, or in some cases to remain off. If this happens, have your headlamp wiring checked right away.

Windshield Wipers The windshield wiper motor is protected by a clrculc DreaKer ana a ruse. 11 the motor overheats due to heavy snow, etc., the wiper will stop until the motor cools. Although the circuit is protected from electrical overload, overload due to heavy snow, etc., may cause wiper linkage damage. Always clear ice and heavy snow from the the windshield before using the windshield wipers. 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 in the fuse panel protect the power windows and other power accessories. When the current load is too heavy, the circuit breaker opens and closes. This protects the circuit until the current load returns to normal or the problem is fixed.

Trailer Wiring Harness The standard seven-wire trailer wiring harness is protected by an in-line fuse in the battery feed wire. This fuse is near the junction block. See “Trailer Wiring Harness” in the Index for more information.

6-79

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. The fuse extractor 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. Be sure to use the correct fuse. If you ever have a problem on the road and don’t have a spare fuse, you can “borrow” one of the correct value. Just pick some feature of your vehicle that you can get along without-like the radio its fuse, if it is of the value you need. Replace or cigarette lighter-and use it as soon as you can. See “Fuses and Circuit Breakers” in the Tndex for more information. Specification Charts 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 truck 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.

6-80

Engine Identification - Gasoline Engines

Engine Type

VIN Code Fuel System Emissions

5.0L V8 TBI? LD

"Light Duty Emissions with 8,500 lbs. (3 850 Kg) GVWR and below. **Heavy Duty Emissions over 8,500 lbs. (3 850 Kg) GVWR. ?Throttle Body Injection Engine Identification - Gasoline Engines (cont.)

Engine Type

VIN Code Fuel System Emissions

7.4L V8 TBI?

LD*/HD**

"Light Duty Emissions with 8,500 lbs. (3 850 Kg) GVWR and below. ""Heavy Duty Emissions over 8,500 lbs. ( 3 850 Kg) GVWR. ?Throttle Body Injection Engine Identification - Diesel Engines

Engine Type

VIN Code Fuel System

6.5L V8

Diesel

6.5L V8

6.5L V8

Turbo Diesel

Turbo Diesel

6-81

Wheel Nut Torque

MODEL

C 1500 K 1500 & C-K 2500 C-K 2500 (w/CGP) C-K 3500 -Single Rear Wheels C3500 -Dual Rear Wheels C3500 HD -Front -Rear

DESCRIPTION 5 bolts ( 14mm) 6 bolts (14mm) 8 bolts ( 14mm)

TORQUE

120 ft. lbs. (1 60 Nmm) 120 ft. lbs. (160 Nmm) 120 ft. lbs. (160 Nom)

8 bolts ( 14mm)

120 ft. lbs. (1 60 Nom)

8 bolts (14rnm)

140 ft. lbs. ( 190 Nmm)

5 bolts (518 in.) 10 bolts (5/8 in.)

175 ft. lbs. (240 Nom) 175 ft. lbs. (240 Nom)

Cooling System Capacity

ENGINE

4.3L 5 .OL

5.7L

6.5L

6.5L

6.5L

7.4L

7.4L w/3500 HD

VIN

QUANTITY*

13 Quarts (12.3 Liters) 17.5 Quarts (16.6 Liters) 17.5 Quarts (16.5 Liters) 23.5 Quarts (22.2 Liters) 23.5 Quarts (22.2 Liters) 23.5 Quarts (22.2 Liters) 25 Quarts (23.5 Liters) 28.5 Quarts (27 Liters)

After refill, the level MUST be checked as outlined under “Engine Cooling System” in Section 5. *All quantities are approximate.

6-82

CranKcase Capacity

ENGINE

VIN

4.3L 5 .OL 5.7L“ 6.5L 6.5L 6.5L 7.4L>$

€4

QUANTITY WITH

FILTER*

4.5 Quarts (4.3 Liters) 5 Quarts (4.8 Liters) 5 Quarts (4.8 Liters) 7 Quarts (6.5 Liters) 7 Quarts (6.5 Liters) 7 Quarts (6.5 Liters) 7 Quarts (6.5 Liters)

After refill, the level MUST be checked as outlined under “Engine Oil And Filter Recommendations” in Section 5. All quantities are approximate. “Add one additional quart for C3500 HD Models. +Oil filter should be changed at EVERY oil change.

Fuel Tank Capacity

TYPE

Gasoline/Diesel with Short Bed with Long Bed Crew Cab Standard Chassis-Cab Models Standard (Side Tank) Optional (Rear Tank) 3500 HD Models Standard (Side Tank) Optional (Rear Tank)

QUANTITY

26 Gallons (98 Liters) 34 Gallons (1 28 Liters)

34 Gallons (1 28 Liters)

23 Gallons (87 Liters) 3 1 Gallons (1 17 Liters)

23 Gallons (87 Liters) 3 1 Gallons ( 117 Liters)

All quantities are for a completely dry tank and are approximate.

6-83

Service Replacement Part and Filter Recommendations - Gasoline Engines 5.7L

Engine VTN

4.3L

5.0L

Oil Filter Air Cleaner

Filter

PCV Valve Spark Plugs* Fuel Filter Radiator Cap

PFS2

A 178CW

CV789C .CR43TS GF48 1 RC36

PF12183- A348C

c v 7 7 4 c .CR43TS GF48 1 RC36

PF1218q A348C

c v 7 7 4 c .CR43TS GF38 1 RC36

+Four Wheel Drive Vehicle - use a PFS2 oil filter W s e AC copper-cored resistor type spark plugs Service Replacement Part and Filter Recommendations - Diesel Engines

7.41

PF1218 A348C

c v 7 7 4 c .CR43TS GF48 I RC36

Engine VIN

Oil Filter Air Cleaner Fuel Filter RC33

Surge Tank Cap

6.5L

PF1218 A644C TP 1006

6.5L

PF1218 A 1236C TP 1 006 RC33

6.51

PF1218 A 1236C TP I006 RC33

6-84

Air Conditioning Refrigerants Not all air conditioning refrigerants are the same. If the air conditioning system in your vehicle needs refrigerant, be sure the proper refrigerant is used. If you’re not sure, ask your GM dealer. For additional information, see your “Warranty and Owner Assistance Information” booklet,

NOTICE: R-134A refrigerant is not compatible with R-12 refrigerant in an air conditioning system. R-12 in an R-134A system will cause compressor failure, refrigerant oil sludge, or poor air conditioning system performance.

Air Conditioning

Refrigerant Capacity

TYPE Refrigerant R-

134A

QTY

2.25 lbs. (1.020 kg)

6-85

Fuse Block

I 25AMP I CLEAR I 30AMP I GREEN I

0.

lo

22

23

l2

24

o2 o3 . D 01 o9 o7 [I,,

[I8

6-86

Fuses and Circuit Breakers

POSITION NAME 1.

STOP/HAZ

T CASE CTSY

GAGES

RR HVAC CRUISE AUX PWR CRANK PARK LPS

AIR BAG WIPER HTR-A/C CIG LTR

ILLUM

DRL-FOG TURN-B/U RADIO BRAKE RADIO BATT TRANS

2. 3.

4.

5. 6. 7. 8. 9.

10. 11. 12. 13.

14.

IS. 16. 17. 18. 19.

20.

21. 22.

CIRCUITS PROTECTED Stop/TCC Switch, Buzzer, CHMSL, Hazard Lamps, Stop Lamps Transfer Case Courtesy Lamps, Cargo Lamp, Glove Box Light, Dome/RDG Lamps, Vanity Mirrors, Pwr Mirrors IP Cluster, DRL Relay, HDLP Switch, Keyless Entry, Low Coolant Module RR HVAC Controls Cruise Control Aux Power Outlet Diesel Fuel Pump, DERM, ECM Lic Lamp, Park Lamp, Tail Lamp, Roof Marker Lamp, Tail Gate Lamps, Front Side Markers, Fog Lamp Relay, Door Switch Illum, Fender Lamps DERM Wiper Motor, Washer Pump A/C, A/C Blower, High Blower Relay Power Amp, Cig Lighter, Door Lock Relay, Pwr Lumbar Seat

4WD, Indicator, LP Cluster, HVAC Controls, RR HVAC Controls, IP Switches, Radio Illumination DRL Relay, Fog Lamp Relay Frt Turn, RR Turn, B/U Lps Radio (Ign) DRAC, 4WAL PCM, ABS, Cruise Radio (Batt)

PRNDL, Auto Transmission, Speedo, Check Gages Tell Tale Not Used Not Used

6-87

POSITION 23. 24. A.%

B . -1-

NAME Not Used 4WD PWR ACCY Pwr Door Lock, 6-Way Pwr Seat, Keyless

CIRCUITS PROTECTED Not Used Frt Axle, 4WD Indicator Lamp

Entry Module Power Windows

PWR WDOS

?Circuit Breaker Lamp and Bulb Data LAMP OR BULB

TRADE NO.

POWER

RATING AT 12.8V, WATTS

HEADLAMPS 2 Headlamp System (Sealed Beam) Low/High Beam 4 Headlamp System (Composite) Low/High Beam High Beam

LAMP OR BULB EXTERIOR Front Marker Lamp Front Park and Turn Lamp Rear Parking Lamp Rear Stop and Turn Lamp Backup Lamp Backup Lamp Rear Park, Stop, and Turn Lamp*

H6054

35/65

6052 9005

55/65

65

TRADE NO.

194

2357NA

3057 3057

3 156 1156 1157

6-88

4

LAMP OR BULB EXTERIOR Fender Clearance Lamp Roof Marker Lamp Cargo Lamp/CHMSL License Plate Lamp Underhood Lamp Reel Lamp

Thassis Cab Only LAMP OR BULB INTERIOR Dome Lamps Reading Lamps Roof Console Lamps:': IP Courtesy Lamp Door Courtesy Lamp Four Wheel Drive Indicator Four Wheel Drive Shift Lever Instrument Panel Compartment Lamp Ashtray Lamp Sunshade Vanity Mirror

"Regular Pickup Model **Crew Cab Model

TRADE NO.

I94

I94 92 I I94 232 232

TRADE NO.

211-2 21 1-2 168 I94 194 194

194

194

194 74

6-89

1

LAMP OR BULB INSTRUMENT PANEL Daytime Running Lamps Indicator? Charging System Indicator Lamp Instrument Cluster Illumination Headlamp Beam Indicator Directional Signal Indicator Brake Warning Indicator SIR (Air Bag) Safety Belt Warning Check Gages Indicator Malfunction Indicator (“Service Engine Soon”) Lamp Upshift Indicator Glow Plugs Lamp** Low Coolant Lamp** Water in Fuel Lamp** Service Throttle Soon Lamp**

**Diesel only “fanadian Vehicles only

TRADE NO.

74

74

194

74

74

74

74 74 74 74

74 74 74 74 74

6-90

Scheduled Maintenance Services

Section

KEEP ENGINE OIL AT THE PROPER

LEVEL AND CHANGE AS RECOMMENDED

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

I protection Plan

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 or the removal of important components can significantly affect the quality of the air we breathe. Improper fluid levels or even the wrong tire inflation can increase the level of emissions from your vehicle. To help protect our environment, and to help keep your vehicle in good condition, please maintain your vehicle properly.

7-1

How This Section is Organized The remainder of this section is divided into five parts: “Part A: Scheduled Maintenance Services” shows 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.

If you are skilled enough to do some work on your vehicle, you will probably want to get the service information GM publishes. See “Service Publications” in the Index. “Part B: Owner Checks and Services” tells you what should be checked whenever you stop for fuel. 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 GM dealer’s service department or another qualified service center should perform. “Part D: Recommended Fluids and Lubricants” lists some products GM recommends 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” provides a place for you to record the maintenance performed on your vehicle. Whenever any maintenance is performed, be sure to write it down in this part. This will help you determine when your next maintenance should be done. In addition, it is a good idea to keep your maintenance receipts. They may be needed to qualify your vehicle for warranty repairs.

7-2

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 i n many other ways. Because of all the different ways people use their GM vehicles, maintenance needs varv. You may even need more frequent checks and replacements than you‘ll find in the schedules in this section. So please read this section and note how you drive. If you have any questions on how to keep your vehicle in good condition. see your GM 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. 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. These schedules are for vehicles that:

carry passengers and cargo within recommended limits. You will find these limits on your vehicle’s CertificatiodTire label. See “Loading Your Vehicle“ in the Index. are driven on reasonable road surfxes within legal driving limits. are driven off-road in the recommended manner. See “Off Road Driving With Your Four-wheel Drive Vehicle” in the Index. use the recommended unleaded fuel. See “Fuel” in the index.

Selecting the Right Schedule The proper maintenance schedule for your vehicle depends on which engine you have in your vehicle and how you use your vehicle. Gasoline engine vehicles and diesel engine vehicles have different maintenance requirements. If you have a diesel engine, follow a schedule designated for diesel engine vehicles only. If you have a gasoline engine. you must first determine whether your engine has a light duty or a heavy duty emissions classification. Follow a maintenance schedule designated for c easoline engines with the emissions classification (light duty or heavy duty) for your engine. See “Engine Identification” in the Index to find your engine‘s emission classification.

7-3

If your engine has more than one emissions classification, the classification is determined by the Gross Vehicle Weight Rating (GVWR) of your vehicle as shown on the Certification Label. See “Loading Your Vehicle” in the Index. Once you’ve determined your engine type and, if necessary, emissions classification, you’ll need to decide which of the two schedules is right for your vehicle. See Definitions for Maintenance Schedule I and Maintenance Schedule I1 following.

Schedule I Definition - Gasoline Engines With Light Duty Emissions

Follow Maintenance Schedule I if any one of these is true for your vehicle: iII Most trips are less than 5 to 10 miles (8 to 16 km). This is particularly

important when outside temperatures are below freezing.

0 Most trips include extensive idling (such as frequent driving in

stop-and-go You operate your vehicle in dusty areas or off-road frequently.

traffic).

0 You frequently tow a trailer. Schedule I should also be followed if the vehicle is used for delivery service, police, taxi, or other commercial application.

Schedule I Intervals - Gasoline Engines With Light Duty Emissions

Every 3,000 Miles (5 000 km) or 3 Months, Whichever Occurs First Engine Oil and Filter Change Chassis Lubrication Drive Axle Service At 6,000 Miles (10 000 km) - Then Every 12,000 Miles (25 000 km) Tire Rotation

Every 75,000 Miles (25 000 km) Air Cleaner Filter Inspection, if driving in dusty conditions Front Wheel Bearing Repack (or at each brake relining) (2WD Only)

7-4

Every 30,000 Miles (50 000 km) Air Cleaner Filter Replacement Spark Plug Replacement Fuel Filter Replacement Clutch Fork Ball Stud Lubrication (5-Speed Manual Transmission With Deep-Low Only) Cooling System Service (or every 24 months, whichever occurs first)

Every 50,000 Miles (83 000 km) Automatic Transmission Service (severe conditions only)

Every 60,000 Miles (100 000 km) Engine Accessory Drive Belt Inspection Spark Plug Wire Inspection Engine Timing Check Fuel Tank, Cap and Lines Inspection Schedule 11 Definition - Gasoline Engines With Light Duty Emissions

Follow Schedule I1 only if none of the conditions from Schedule I is true.

Schedule I1 Intervals - Gasoline Engines With Light Duty Emissions

Every 7,500 Miles (12 500 km) Engine Oil and Filter Change (or every 12 months, whichever occurs first) Chassis Lubrication (or every 12 months, whichever occurs first) Drive Axle Service At 7,500 Miles (12 500 km) - Then Every 15,000 Miles (25 000 km) Tire Rotation

7-5

Every 30,000 Miles (50 000 km) Cooling System Service (or every 24 months) Spark Plug Replacement Fuel Filter Replacement Air Cleaner Filter Replacement Front Wheel Bearing Repack

Every 50,000 Miles (83 000 km) Automatic Transmission Service (severe conditions only)

Every 60,000 Miles (100 000 km) Spark Plug Wire Inspection Engine Accessory Drive Belt Inspection Fuel Tank, Cap and Lines Inspection Engine Timing Check

Schedule 1 Definition - Gasoline Engines With Heavy Duiy Emissions

Follow Maintenance Schedule I if any one of these is true for your vehicle: 0 Most trips are less than 5 to 10 miles (8 to 16 km). This is particularly

important when outside temperatures are below freezing. Most trips include extensive idling (such as frequent driving in stop and go traffic). You operate your vehicle in dusty areas or off-road frequently. You frequently tow a trailer.

Schedule I should also be followed if the vehicle is used for delivery service, police, taxi, or other commercial application.

7-6

Schedule I Intervals - Gasoline Engines with Heavy Duty Emissions

Every 3,000 Miles (5 000 km) Engine Oil and Filter Change (or every 3 months, whichever occurs first) Chassis Lubrication (or every 3 months, whichever occurs first) Drive Axle Service At 6,000 Miles (10 000 km) - Then Every 12,000 Miles (25 000 km) Tire Rotation

Every 12,000 Miles (20 000 km) Air Cleaner Filter Inspection, if Driving in Dusty Conditions Front Wheel Bearing Repack (or at Each Brake Relining) (2-Wheel Drive Only 1 Fuel Filter Replacement Engine Accessory Drive Belt Inspection Shields and Underhood Insulation Inspection Thermostatically Controlled Engine Cooling Fan Check (or every 12 months, whichever occurs first)

Every 24,000 Miles (40 000 km) Cooling System Service (or every 24 months, whichever occurs first) Air Cleaner Filter Replacement Engine Timing Check Thermostatically Controlled Air Cleaner Inspection Air Intake System Inspection

Every 27,000 Miles (45 000 km) Spark Plugs Replacement

Every 30,000 Miles (50 000 km) Clutch Fork Ball Stud Lubrication (%Speed Transmission with Deep-Low Only)

7-7

Every 50,000 Miles (83 000 km) Automatic Transinission Service

Every 60,000 Miles (100 000 km) Spark Plug Wire Inspection Exhaust Gas Recirculation (EGR) System Inspection Fuel Tank, Cap and Lines Inspection Evaporative Control System Inspection Electronic Vacuum Regulator Valve (EVRV j Inspection Schedule I1 Definition - Gasoline Engines With Heavy Duty Emissions Follow Schedule TI only if none of the conditions from Schedule I is true.

Schedule I1 Intervals - Gasoline Engines with-Heavy Duty Emissions

Every 6,000 Miles (10 000 km) Engine Oil and Filter Change (or every 3 months. whichever occurs first) Clussis Lubrication (or every 3 months, whichever occurs first) Drivc Axle Scrvice At 6,000 Miles (10 000 km) - Then Every 12,000 Miles (20 000 km) Tire Rotation

Every 12,000 Miles (20 000 km) Engine Accessory Drive Belt Inspection Shields and Underhood Insulation Inspection Thermostatically Controlled Engine Cooling Fan Check (or every 12 months, whichever occurs first)

7-8

Every 24,000 Miles (40 000 km) Cooling System Service (or every 24 months, whichever occurs first) Air Cleaner Filter Replacement Front Wheel Bearing Repack (or at Each Brake Relining) (2-Wheel Drive Only 1 Fuel Filter Replacement Engine Timing Check Thermostatically Controlled Air Cleaner Inspection Air Intake System Inspection Every 27,000 Miles (45 000 km) Spark Plugs Replacement Every 30,000 Miles (50 000 km) Clutch Fork Ball Stud Lubrication (5-Speed Transmission with Deep-Low Only) Every 50,000 Miles (83 000 km) Automatic Transmission Service Every 60,000 Miles (100 000 km) Spark Plug Wire Inspection Exhaust Gas Recirculation (EGR) System Inspection Fuel Tank, Cap and Lines Inspection Evaporative Emission Control System Inspection Electronic Vacuum Regulator Valve (EVRV) Inspection

Schedule I Definition - Diesel Engines Follow Maintenance Schedule I if any one of these is true for your vehicle: Most trips are less than 5 to 10 miles (8 to 16 km). This is particularly important when outside temperatures are below freezing. Most trips include extensive idling (such as frequent driving in stop and go traffic). You operate your vehicle in dusty areas or off-road frequently. You frequently tow a trailer.

Schedule I should also be followed if the vehicle is used for delivery service. Dolice, taxi, or other commercial application.

7-9

I Schedule

Intervals

- Diesel Engines

Every 2,500 Miles (4 000 km) Engine Oil and Filter Change (or every 3 months, whichever occurs first) Chassis Lubrication (or every 3 months, whichever occurs first) Air Cleaner Filter Inspection. if Driving in Extremely Dusty or Dirty (Off-Road) Conditions

Every 5,000 Miles (8 000 km) Drive Axle Service

Every 7,500 Miles (12 000 km) Air Cleaner Filter Inspection, if Driving in Dusty Conditions At 7,500 Miles (12 000 km) - Then Every 15,000 Miles (24 000 km) Tire Rotation

Every 10,000 Miles ( I 6 000 km) Shields and Underhood Insulation Inspection Thermostatically Controlled Engine Cooling Fan Check (or every 12 months, whichever occurs first) Air Intake System Inspection

Every 15,000 Miles (24 000 km) Air Cleaner Filter Replacement Front Wheel Bearing Repack (or at Each Brake Relining) (2-Wheel Drive Only j

Every 30,000 Miles (50 000 km) Clutch Fork Ball Stud Lubrication (%Speed Transmission with Deep-Low Only:) Fuel Filter Replacement Cooling System Service (or every 24 months, whichever occurs first)

Every 50,000 Miles (80 000 km) Automatic Transmission Service

7- 10

Every 60,000 Miles (100 000 km) Crankcase Depression Regulator Valve (CDRV) System Check Engine Accessory Drive Belt Inspection Fuel Tank, Cap and Lines Inspection Evaporative Control System Inspection Exhaust Gas Recirculation (EGR) System Inspection (if equipped) Exhaust Pressure Regulator Valve Inspection

I Schedule 11 Definition - Diesel Engines Follow Schedule II on!\- if none ofrhe conditions i'wm Schcdtilc I Is truc. I Schedule I1 lntervals - Diesel Engines 1

Every 5,000 Miles (8 000 km) Engine Oil and Filter Change (or every 12 months, whichever occurs first) Chassis Lubrication (or every 12 months, whichever occurs first) Drive Axle Service At 5,000 Miles (8 000 km) - Then Every 10,000 Miles (16 000 km) Tire Rotation

Every 10,000 Miles (16 000 km) Shields and Underhood insulation Inspection Air Intake System Inspection Thermostatically Controlled Engine Cooling Fan Check (or every I2 months, whichever occurs first)

Every 30,000 Miles (48 000 km) Cooling System Service (or every 24 months, whichever occurs first) Front Wheel Bearing Repack (or at Each Brake Relining) (2-Wheel Drive Only) Fuel Filter Replacement Air Cleaner Filter Replacement Clutch Fork Ball Stud Lubrication (5-Speed Transmission with Deep-Low Only)

7-11

Every 50,000 Miles (83 000 km) Automatic Transmission Service