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Four-Wheel and Six-Wheel Drum Brakes (Air Only) The brake drums should be removed and inspected each time the tires are removed for rotation or changing. When you have the front brakes replaced, have the rear brakes inspected, too. Brake linings should always be replaced as complete axle sets. 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 brakes adjust for wear. Air Brake Systems (If Equipped) If you have air brakes, it is important to get rid of moisture in the system. Moisture will damage your system if it isn’t removed daily.
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There are two ways to do this. One is automatic if your air-brake vehicle has the optional moisture ejector. If your vehicle doesn’t have that option, however, you must drain the air reservoirs every day.
Drain them at full system pressure. To be sure you’re at full pressure, check your air pressure gage. It should read at least 100 psi (692 kPa).
Moisture Ejector (Option) If you have air brakes with a moisture ejector, the valve automatically ejects moisture from the reserve tank when the air compressor cycles.
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Air Dryer (Option) If your vehicle has air brakes, it may have an air dryer. This collects and removes dirt, moisture or other foreign matter from the air prior to entering the brake system. It is mounted on the left frame rail.
Alcohol Injector (Option) If your vehicle has air brakes, it may have an alcohol injector. It is on the frame or crossmember at the right front corner of the vehicle.
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If your dryer is a Bendix-Westinghouse, it has a filter that you need to change at intervals. See your Maintenance Schedule for more about servicing this filter.
The alcohol injector helps prevent moisture in the air brake system from freezing. Use it only in cold weather, 32_F (0_C) or below.
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To turn it on in cold weather, turn the valve so that the word ON is on top. When the temperature is above freezing, turn the valve to OFF.
During the cold weather season, you may find that you need to check this bottle once a week.
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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 have to have 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.
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Electric/Hydraulic Parking Brake Fluid If you have an electric/hydraulic parking brake, a good time to check the fluid level is when you check the fluid levels under the hood.
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How to Check and Add Fluid First, apply the parking brake. To check the fluid level, look at the MAX and MIN lines on the side of the reservoir. If the level is below the MAX line, add fluid. To add fluid, clean away any dirt around the reservoir cap. Remove the reservoir cap and add enough fluid to bring it up to the MAX level.
NOTICE:
Always use proper fluid (automatic transmission fluid), not brake fluid. Failure to use the proper fluid can cause leaks and damage hoses and seals.
If you need to add fluid, use Dexron III automatic transmission fluid (GM Part Number 12345881).
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Clutch Pedal Free Travel If you have a manual transmission, your clutch will need adjustment when pedal free travel gets down to about 1 1/4 inch (32 mm), as measured at the clutch pedal pad. You should have 1 1/2 to 2 inches (38 to 51 mm) of clutch pedal free travel. Your Maintenance Schedule has more on this. If your clutch ever needs service, be sure to use only genuine GM clutch replacement parts.
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Chassis Lubrication Your Maintenance Schedule provides all of the required chassis lubrication intervals and identifies proper lubricants to use. Be sure to see your Maintenance Schedule before performing any chassis lubrication service. To determine location of chassis lubrication items, use the following charts.
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Single Axle Models
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ITEM NO.
10
1112
1314
ITEM Brake Camshaft n, Brake Caliper Rails (If Equipped)$ Steering Column Slip Joint* Steering Drag Link Ends Steering Column U-Joints Pivot Points and Hinges Slack Adjuster n Brake Cam Roller Pins at interface of pin and shoe n Front Steering Knuckles
Front Wheel Bearings Steering Tie Rod Ends Spring Slip Pads* (Multi-Leaf Only) Clutch Release Bearing* Battery Terminal (except “ST” type) Parking Brake Bell Crank*$
REMARKS One fitting each (apply sparingly). For caliper rails, apply Aero Shell #5 Lubricant. One fitting. One fitting at each end. One fitting each joint. Apply chassis lubricant. One fitting. Apply engine oil.
One fitting each side, lower bushing (hand-operated grease gun only). Hand-pack upper bearing. Hand-pack or lubricate. One fitting each end. Apply chassis lubricant.
Cup or fitting. Keep coated with petroleum jelly.
One fitting.
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ITEM NO.
15
16
1718
19
20
21
22
23ITEM Transmission Transmission-Auto*[ Propshaft Slip Joint
Propshaft U-Joints
Rear Wheel Bearing Rear Axle Parking Brake Clevis Pin$ Master Cylinder $ Parking Brake Lever Pivot*$
REMARKS Fill to level of filler plug. Check fluid level. One fitting each joint; lubricate with GM Part No. 1051344 Wheel Bearing Lubricant. One fitting each joint (1480 and 1550 Series); lubricate with GM Part No. 1051344 Wheel Bearing Lubricant. Two fittings each joint (1610 Series and larger); lubricate with GM Part No. 1051344 Wheel Bearing Lubricant. Hand-pack or lubricate. Fill to level of filler plug. Apply chassis lubricant. Fill to 1/4″ (6 mm) below opening. Apply chassis lubricant.
* Applies to some vehicles. n Applies to air brakes only. [ Refer to Allison Transmission Operator’s Manual. $ Applies to hydraulic brakes only.
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Tandem Axle Models
ITEM NO.
ITEM
REMARKS
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Brake Camshafts One fitting each. Propshaft U-Joint One fitting each joint
(1480 and 1550 Series). Lubricate with GM Part No. 1051344, Wheel Bearing Lubricant. Apply engine oil at pin to shoe joint only. One fitting each side. Hand-pack or lubricate. Fill to level of filler plug. Two fittings each side. Lubricate with GM Part No. 1051344 Wheel Bearing Lubricant.
Brake Shoe Roller Pins Rear Spring Pin Wheel Bearings Rear Axles Propshaft Slip Joint
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Battery Your new vehicle comes with one or more ACDelco FreedomR maintenance free batteries. When it’s time for a new battery, we recommend an ACDelco Freedom maintenance free battery. Be sure it has the replacement number shown on the original battery’s label. 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. (If your vehicle has more than one battery, be sure to remove the negative (-) battery cable from each battery.)
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.
When you are ready to use the vehicle again, refer to the engine starting procedure in the Index. Contact your dealer to learn how to prepare your vehicle for longer storage periods.
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Windshield Wiper Blade Insert Replacement
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Windshield wiper blades should be inspected at least twice a year for wear or cracking. See “Wiper Blade Check” in Section 7 of this manual under Part B “Owner Checks and Services” for more information.
Replacement blades come in different types and are removed in different ways. Here’s how to remove the Sheppard’s Hook type: 1. Pull the windshield wiper arm 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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Other Service Items Component Box Your vehicle has a component box along the left frame rail. What is in the box depends on what options are on your vehicle. Normally, the fuel filter, air dryer, Luberfiner oil filter, emission canister or other components are in there.
You can then remove the front cover if you need to, by removing the two 8 mm bolts and pulling it off. When you’re through, be sure to put the front cover on, before you put on the top cover. Fuel Filter (Gasoline Engines) The steel fuel filter is located inside the component box at the rear. See your Maintenance Schedule for recommended service intervals.
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To get into the box, you first have to remove the top cover. To do that, remove the two 8 mm bolts on top and the single 8 mm bolt at the top front. Then, pull the cover toward you and lift it off. 6-44
If your vehicle is equipped with the optional Davco spin-on type filter, it is also located in the component box.
Fuel Filter (Diesel Engines) The ACDelcoR fuel filter is located in the component box. See your Maintenance Schedule for recommended service intervals. Primary Fuel Filter and Water Separator (Option)
If you have a CaterpillarR diesel engine, you may have this spin-on filter. It is in the component box on the driver’s side behind the fender.
It has a clear plastic drain bowl at the bottom. Check the drain bowl occasionally for any water or particles. To drain the bowl, shut off the engine. Then partially open the drain valve at the bottom of the filter. See “Engine Oil” in the Index for proper disposal procedures.
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Secondary Fuel Filter and Water Separator/Heater (Option)
If you have a CaterpillarR diesel engine, you may have this spin-on filter and fuel separator/heater. It is mounted on the passenger’s side of the engine.
It has a metal drain bowl at the bottom. Occasionally, check the bowl for any water or particles. To check or drain the bowl, shut off the engine. Then push up on the spring loaded drain valve until clear fuel is flowing from the valve. The particles or water will drain out first. See “Engine Oil” in the Index for proper disposal procedures.
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Automatic Ether Injection System (Option)
If your diesel engine vehicle has this feature, the ether cylinder is on the upper right rear side of the engine compartment.
To change an empty ether cylinder, follow these steps. 1. Loosen the 5/16 inch screw head on the
cylinder-to-bracket clamp.
2. Spread the clamp apart.
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3. Clean any dirt from the neck of the cylinder and the
top of the valve before you take out the cylinder.
4. Check the inside of the valve for any foreign matter.
Clean the valve as necessary.
5. Cover the valve to protect it from dirt and take out
the cylinder.
6. Install a new gasket whenever you take out the
cylinder. Use only one gasket and spread a light film of clean oil on it before installation.
7. Put in the new cylinder. Turn it clockwise until it just
starts to contact the gasket.
8. Tighten the cylinder another half turn (180 degrees).
Don’t over-tighten.
9. Retighten the cylinder clamp.
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Front Wheel Bearings with Oil-Filled Hubs If your vehicle has oil-filled hubs, occasionally check to see if they have enough oil. You can tell by looking into the sight glass to see if there is oil there.
Air Conditioning System Every now and then, have your dealership check your air conditioning system to be sure it has not lost any cooling ability. If you think the system is not working properly, have your GM Truck dealer check it out as soon as possible. The air conditioning won’t work when the temperature outside is below 40_F (4_C).
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If there isn’t, clean the rubber fill plug in the center of the glass, and then remove it. Be careful not to allow any dirt or water to get into the oil. Add enough of the recommended oil to bring it up to the level mark that you’ll see on the glass. Refer to your Maintenance Schedule for the proper oil to use. When you fill the hub, check the glass again after driving a short distance. It takes a while for the oil to flow through the system, and you may find that you have to add a little more to fill it to the proper level.
NOTICE:
If your vehicle is equipped with factory air conditioning, the system is charged with the R-134a refrigerant. Servicing of the air conditioning system should be performed by a trained service technician.
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Muffler/Catalytic Converter Assemblies (Diesel Engines) Some vehicles equipped with a CaterpillarR diesel engine utilize a catalytic converter-muffler assembly. If your vehicle is equipped with a catalytic converter-muffler, some special procedures may need to be followed when servicing your vehicle. Consult your GM Truck dealer who is an authorized CaterpillarR engine dealer for service. To determine your vehicle’s muffler type, examine the muffler outer housing. If your system is a catalytic converter-muffler type, the housing will be stamped with the CAT logo. 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.
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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.
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 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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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.
Rims and Wheels Rims and wheels are stamped with a maximum load and cold inflation rating. Be sure you don’t exceed these limits. Dual Tire Operation When the vehicle is new, or whenever a wheel, wheel bolt or wheel nut is replaced, check the wheel nut torque as indicated: If your vehicle has stud piloted or hub piloted wheels, tighten the wheel stud nuts to the specified torque values at 100 miles (160 km), 500 miles (800 km) and 1,000 miles (1 600 km) and then every 1,000 miles (1 600 km) thereafter. 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 “Changing a Flat Tire” in the Index for more information.
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When It’s Time for New Tires Replace your tires when the tread depth is down to 1/8 of an inch (3.2 mm) for the front tires, or 1/16 of an inch (1.6 mm) for a rear tire. Also, you need a new tire if: 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.
When you replace tires, make sure they are the same size, load range, speed rating and construction type (bias, bias-belted or radial) as your original tires. Wheel Alignment and Tire Balance The wheels on your vehicle were aligned at the factory to give you the longest tire life and best overall performance. Proper front wheel alignment must be maintained in order to ensure efficient steering, good directional stability, and prevent abnormal tire wear. If you notice unusual tire wear or your vehicle is 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 balanced.
CAUTION:
Mixing tires could cause you to lose control while driving. If you mix tires of different types -- like radial and bias-belted tires -- the vehicle may not handle properly, and you could have a crash. Be sure to use the same type of tires all around.
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Tightening the Wheel Nuts
CAUTION:
Wheel nuts that are not tight can work loose. If all the nuts on a wheel come off, the wheel can come off the vehicle, causing a serious crash. All wheel nuts must be properly tightened. Follow the rules in this section to be sure they are.
This section lets you know how often to check the tightness of the wheel nuts on your vehicle and how tight they must be. First, use these pictures to decide what kind of wheels you have.
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Hub-Piloted Type,
8-Hole
Hub-Piloted Type,
10-Hole
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Stud-Piloted Type, 10-Hole
Then, follow the steps below for the wheels you have. Cast-Type Wheel 1. Put the tire and rim assembly on the axle hub. 2. Install the rim spacer at the rear. 3. Install the outer rear tire and rim assembly so that its valve stem is exactly opposite the valve stem on the inner tire and rim assembly.
4. Install the rim clamps and nuts. Position
them properly.
NOTICE:
If you tighten a nut when a rim clamp is not positioned properly, it can damage the rim and also cause the wheel to wobble in operation. Be sure to position the rim clamps properly before you go on to the next step.
5. Finger-tighten the nuts. Be sure that all of the wheel
clamps are seated all the way around the wheel.
6. Tighten all of the nuts using the following diagram.
Be sure to use the one that matches your wheels.
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7. Now repeat Step 6, but this time tighten the nuts to
200 lb-ft (271 N·m) of torque.
8. Turn the wheel and measure along the sidewall to see
how much wheel run-out there is. There should be no more than 1/8 inch (3 mm) on the front wheels and 3/16 inch (5 mm) on the rear wheels. If there is too much wheel run-out, you can try loosening the nuts on the side where there is the most run-out and tightening the opposite nuts. When you finally have the tire running true, tighten all of the nuts to 200 lb-ft (271 N·m).
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Stud-Piloted 10-Stud Wheel The studs and nuts used on the right side of the vehicle have right-hand threads. Those used on the left side have left-hand threads. It is easy to tell by looking at the nuts, because they are stamped R or L. 1. Put the tire and rim assembly on the axle hub. 2. Put on the wheel nuts. If you use oil or grease on the
wheel studs or nuts, the wheel nuts can’t tighten properly. This could let the wheel come off as you are driving.
3. Finger-tighten the nuts on the rear inner wheels and
the front wheels.
4. Tighten these nuts to 575 lb-ft (780 N·m), unless
you have aluminum wheels and/or aluminum hubs. If you have aluminum wheels and/or aluminum hubs, tighten the nuts only to 475 lb-ft (644 N·m). Use the following diagram to do this.
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Front or Inner Dual
Wheel
Outer Dual Wheel
5. Install the outer rear tire and rim assembly so that its valve stem is exactly opposite the valve stem on the inner tire and rim assembly.
6. Put on the wheel nuts. 7. Finger-tighten the wheel nuts. 8. Tighten the nuts to the same torque numbers shown
in Step 4.
Whenever tightening both the inner and outer rear wheel nuts, first loosen the outer wheel nuts. Then tighten the inner nuts. Finally, tighten the outer nuts.
CAUTION:
Never use oil or grease on studs or nuts. If you do, the nuts might come loose. Your wheel could fall off, causing a serious accident.
Hub-Piloted Wheels, 8-Hole or 10-Hole The studs and nuts used with these wheels have right-hand threads. 1. With intermittent pilot pads, position a pad at
12 o’clock to center the wheel and reduce run-out.
2. Put the tire and rim assembly on the axle hub. Install the outer rear tire and rim assembly so that its valve stem is exactly opposite the valve stem on the inner tire and rim assembly. 3. Put on the wheel nuts. 4. Finger-tighten the nuts.
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5. Oil the surfaces between the nuts and washers as shown. Do not oil the studs or the threads of the nut.
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6. Tighten the nuts to 400 lb-ft (542 N·m) if an eight-hole stud or 480 lb-ft (650 N·m) if a 10-hole stud, use the following diagrams.
8-Hole
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CAUTION:
If wheel studs are damaged, they can break. If all the studs on a wheel broke, the wheel could come off and cause a serious crash. If any stud is damaged because of a loose-running wheel, it could be that all of the studs are damaged. To be sure, replace all studs on the wheel. If the stud holes in a wheel have become larger, the wheel could collapse in operation. Replace any wheel if its stud holes have become larger or distorted in any way. Inspect hubs and hub piloted wheels for damage. Because of loose running wheels, piloting pad damage may occur and require replacement of the entire hub, for proper centering of the wheels.
(Front or Inner Dual
10-Hole
Wheel)
10-Hole
(Outer Dual Wheel)
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CAUTION:
Rust or dirt on a wheel, or on the parts to which it is fastened, can make the wheel nuts become loose after a time. The wheel could come off and cause an accident. When you change a wheel, remove any rust or dirt from the places where the wheel attaches to the vehicle. In an emergency, you can use a cloth or 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.
How Often to Check Wheel tightness is so important you should have a technician check nut tightness on all wheels with a torque wrench every 1,000 miles (1 600 km). When your vehicle is new or when a wheel or fastener is new you should have a technician tighten the wheel stud and rim clamp nuts, with a torque wrench, at 100, 500 and 1,000 miles (160, 800 and 1 600 km). The reason for this is that the clamping system has to seat before the fasteners will stay tightened.
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Wheel Replacement Replace any wheel that is bent, cracked or badly rusted. If wheel nuts keep coming loose, replace the wheel. If the wheel leaks air, replace it. Your dealer will know the kind of wheel you need.
CAUTION:
A leaking wheel could fail without warning. A wheel designed for tubeless tires could be leaking because it is damaged. Don’t use an inner tube or some other thing to try to stop the leaking. Get a new wheel of the proper type.
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CAUTION:
NOTICE:
Without the correct wheel, you may not be able to stop properly, and you could have other problems like a tire air-out. You could have a collision. If you don’t go to your dealer to get a new wheel, be sure you get the correct one. Each new wheel should match the original wheel in load-carrying capacity, inflation pressure capacity, diameter, width, offset and mounting configuration.
Using wheels and tires with higher load-carrying limits than the original wheels and tires doesn’t change the GAWR or the GVWR of your vehicle.
The wrong wheel can cause trouble in bearing life, brake cooling, speedometer/odometer calibration, headlamp aim, bumper height, vehicle ground clearance, stopping distance and tire clearance to the body and chassis. You could also have other problems like a tire air-out.
Used Replacement Wheels
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.
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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.
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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. Cleaning of Fabric/Carpet Your dealer has two cleaners, Multi-Purpose Interior Cleaner and Capture Non-Solvent Dry Spot and Soil Remover for cleaning 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.
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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 Multi-Purpose Interior 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. Mix powdered cleaner following the directions on
the container label to form thick suds.
4. Use suds only and apply 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 the suds.
6. Wipe cleaned area with a clean, damp 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 multi-purpose interior
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. 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 instructions for
Multi-Purpose Interior Cleaner.
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Fabric Protection Your vehicle has upholstery that has been treated with Scotchgardt Fabric Protector, a 3M product. It 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 often to keep it looking new. Further information on cleaning is available by calling 1-800-433-3296 (in Minnesota, 1-800-642-6167). 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 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.
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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 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.) 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. 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 GM Windshield Cleaner, Bon AmiR Powder (non-scratching glass cleaning powder), GM Part No. 1050011. The windshield is clean if beads do not form when you rinse it with water.
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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. 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 vehicle washes may cause water to enter your vehicle.
Cleaning Exterior Lamps/Lenses Use lukewarm or cold water, a soft cloth and a vehicle 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 may have 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.
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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.
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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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 vehicle washing system can do this for you.
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GM Vehicle Care/Appearance Materials
PART NUMBER
SIZE
DESCRIPTION
USAGE
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994954
1050172
1050173
1050174
1050214
1050427Polishing Cloth – Wax Treated
23 in. x 25 in. Tar and Road Oil Remover 16 oz. (0.473 L) Chrome Cleaner and Polish 16 oz. (0.473 L) 16 oz. (0.473 L) White Sidewall Tire Cleaner 32 oz. (0.946 L) 23 oz. (0.680 L)
Vinyl Cleaner Glass Cleaner
1052918**
8 oz. (0.237 L)
Armor Allt Protectant
Exterior polishing cloth
Removes tar, road oil and asphalt
Use on chrome, stainless steel, nickel, copper and brass
Removes soil and black marks from whitewalls Cleans vinyl tops, upholstery and convertible tops
Removes dirt, grime, smoke and fingerprints
Protects leather, wood, acrylics, Plexiglast, plastic,
rubber and vinyl
1052925
16 oz. (0.473 L)
Multi-Purpose Interior
Cleaner
Cleans carpets, seats, interior trim, door panels
and floor mats
Capture Dry Spot Remover
2.5 sq. ft.
Wheel Cleaner
16 oz. (0.473 L) 8 oz. (0.237 L)
1052929
1052930
12345721
12345725
12377964* 12377966* 12377984* See your General Motors Parts Department for these products. See “Recommended Fluids and Lubricants” in the Index.12 oz. (0.354 L) 16 oz. (0.473 L) 16 oz. (0.473 L) 16 oz. (0.473 L)
Synthetic Chamois Silicone Tire Shine
Finish Enhancer
Surface Cleaner
Cleaner Wax
Spray on and rinse with water
Attracts, absorbs and removes soils on fabric
Shines vehicle without scratching
Spray on tire shine
Removes dust, fingerprints and surface contaminants Removes light scratches and oxidation and protects finish
Removes contaminants, blemishes and swirl marks
* For exterior use only. **Not recommended for use on instrument panels.
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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 Statement One of these statements is on your Certification/Tire label. Here is what each one means. TRUCK SERVICE -- A vehicle made to carry property or special equipment. It is made for uniform frame loading. That includes using the vehicle to pull a full trailer.
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TRUCK-TRACTOR -- A vehicle made to draw other vehicles. It’s made to carry part of the load of the trailer. It is made for point frame loading, usually for a semi-trailer (“fifth wheel”). MAX. VERT. CG -- The highest allowable vertical center of gravity, at the highest allowable GVWR. It’s measured from level ground in inches. TRUCK-CANADA -- A vehicle first sold in Canada with a non-school bus application, or cab models with regular production option RQ2 (“truck service”). TRACTOR-CANADA -- A cab model with regular production option RQ3 (“truck-tractor service”). Service Parts Identification Label You’ll find this label in a location determined by the body manufacturer. 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.
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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.
Headlamp Wiring The headlamp wiring is protected by a circuit breaker in the light switch. An electrical overload will cause the lights to go on and off, or in some cases to remain off. If this happens, have your headlamp wiring checked right away.
Windshield Wiper Fuses The windshield wiper motor is protected by a circuit breaker inside the motor and a circuit breaker in the fuse block. If the motor overheats, the wipers will stop until the motor cools. If the overload is caused by an electrical problem, be sure to get it fixed. Fusible Links A fusible link is a short piece of wire several gage sizes smaller than the circuit it protects. It will melt in an overload situation, opening the circuit. Your starter relay and other circuits have these fusible links. The size is printed on the insulation. If the insulation is burned beyond recognition, consult your GM dealer for the proper size. Replace a fusible link with one of the same size and insulation type. Fusible link insulation is a special purpose high-temperature material. The hydraulic brake booster motor feed circuit and starter relay circuit are protected by a fusible link. Vehicles with a diesel engine have a fusible link for the intake heater feed circuit. Vehicles equipped with an electronically controlled diesel engine also have a fusible link for the engine control unit.
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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. Fuses and Circuit Breakers The wiring circuits in your vehicle are protected from short circuits by a combination of fuses, circuit breakers, maxi-fuses and fusible links. This greatly reduces the chance of a fire caused by an electrical problem. There may be a fuse taped to the wiring harness inside the battery box and one near the generator also taped to the wiring harness. There are two circuit breaker/fuse blocks in your vehicle: the instrument panel circuit breaker block and the maxi-fuse block.
Instrument Panel Circuit Breaker Block This fuse block is in the lower portion of the instrument panel, to the left of the steering column.
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To open the door, pull up and outward on the recessed door handle and the door will snap out.
To install the door, place the lower door into the bottom retainer and push the top of the door in until it snaps into place. If you ever have a problem on the road and don’t have a spare circuit breaker, you can borrow one of the correct value. Just pick some feature of your vehicle that you can get along without -- like the radio or cigarette lighter -- and use its circuit breaker if it is of the value you need. Remember to replace the circuit breaker as soon as you can. These circuit breakers are non-cycling; do not replace them with cycling circuit breakers. Also, don’t use circuit breakers of higher amperage than those indicated on the circuit breaker block.
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Name B/U IGN3
STOP WASH/WIPE
DOME/PNL
BLOWER A/C
TRN/HAZ
Circuits Protected Fuel Filter Relay, Blower Motor Relays, ABS Power Relay, Back-Up Lamps, Auxiliary Wiring Relay, IGN 3 Relay, Power Window Relay, Vehicle Interface Module, Transmission Temperature Gage Stoplamps Windshield Wipers/Washer, Accessory Relay Dome Lamp, Radio Receiver, Instrument Panel Lights, A/C Controller, Headlamp/Seatbelt Module Blower Motor A/C Clutch Compressor, A/C Controller Turn Signals, Hazard Flashers
Name HYD BRK HYD BRK
Circuits Protected Brake Pump Motor Relay Brake Alarm Module
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Name CHAS
PARK LP
HORN PRK BRK FUEL
AXLE
MRKR LP
Circuits Protected Exhaust Brake, Air Suspension Dump Valve, Air Dryer, HYD ABS ECHU Auxiliary Wiring, Air Conditioner Controls, Parking Lamps, Turn Signals, Taillamps, Stoplamps, Marker Lamps, Trailer Running Lamps, Lighted Mirrors, Radio Receiver, Mirror Clearance Lamps Horn/Diagnostic Connector Parking Brake Module Heated Fuel Filter (Diesel Engines) or Fuel Pump (Gasoline Engines) Heated Mirrors, Radiator Shutters, Two-Speed Axle Motor, Two-Speed Axle Switch Roof Marker Lamps, Trailer Marker Lamps, Marker Lamp Relay
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Name CIG/AUX
AUX IGN RLY/VIN
WDO CRNK IGN SW AUX RDO DR LK
Circuits Protected Cigarette Lighter, Auxiliary Power Jacks Auxiliary Wiring Relay Vehicle Interface Module (Diesel Engines) or Generator, Coil, Injectors (Gasoline Engines) Power Windows Starter Relay Instrument Panel Cluster Telltales Auxiliary Wiring Radio, Auxiliary Wiring Power Door Locks
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Maxi-Fuse Block When a circuit goes out, first check the instrument panel circuit breaker block. If no circuit breakers are out there, the problem could in the maxi-fuse block. This block uses blade-type fuses. It’s on the upper passenger side of the engine compartment at the rear.
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To access the maxi-fuse block, gently squeeze both sides of the cover to unlatch the tabs at the top. Then, unsnap both attachments at the bottom and remove the cover. Power is fed through these fuses to devices such as the headlamp switch, ignition switch feed circuits and the auxiliary brake pump (hydraulic brake vehicles). Be sure to replace maxi-fuses with maxi-fuses of the same rating. Do not use maxi-fuses of higher amperage than those indicated on the maxi-fuse block.
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Name
INT/EXT LIGHTS HEAD LAMP
AUX WRG IGN SW1
HYD PUMP
HYD ABS PWR WDO/LCKS PARK BRK BLOWER HORN FUEL/ENGINE
Circuits/Circuit Breakers Protected Parking Lamps, Dome/Panel Lights Headlamps, Daytime Running Lamps Auxiliary, Park Brake Ignition Switch, Wash/Wipe, Crank, Radio Hydraulic Brake, Brake Pump Motor EHCU Window, Door Locks
Parking Brake Motor Blower, Horn, Cigarette Lighter/Auxiliary Empty
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Name
STP/HAZ TURN
IGN SW3
Circuits/Circuit Breakers Protected Stop Lamp, Turn Signal/Hazard Lights, Fuel, Ignition Relay (Gasoline Engines) Air Conditioner, Ignition Switch, Axle, Chassis
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Replacement Bulbs It is recommended that you use an ACR type bulb whenever you need to replace one. Before you replace any bulbs, be sure that all lamps are off and the engine isn’t running. Capacities and Specifications Replacement part numbers listed in this section are based on the latest information available at the time of printing. They are subject to later change. If a part listed here isn’t the same as the part in your vehicle when it was built, or if you have any questions, please contact your GM Truck dealer. Engine Identification and Data Engine RPO Engine Type Fuel System Firing Order
LP4/L21
7.4L V8
SPFI 1-8-4-3-6-5-7-2LG5
7.2L L6
HEUI 1-5-3-6-2-4Wheel Nut Torque Refer to “Tightening the Wheel Nuts” in this section for wheel nut torque information.
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Cooling System Capacity Model 7.2L
with automatic transmission
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
with automatic transmission
7.4L
Quarts (Liters) 32.0 (30.0) 30.0 (28.4) 25.0 (23.7) 23.0 (22.7)
Above capacities (volumes) are approximate. Crankcase Capacity Capacities (volumes) shown are for normal refill. Add oil as indicated when the oil filter element is changed. Capacities given are approximate -- keep level within the operating range. Do not operate with fluid level below the ADD line.
Engine
Capacity-- Quarts (Liters)
7.2L 7.4L
21 (19.0)*
8 (7.5)
*Additional oil is required with auxiliary oil filter systems. Make sure to add enough extra oil to fill the auxiliary oil filter system. For vehicles equipped with the LUBERFINER 750-C, add 14 quarts (13.25 L).
Extending the recommended oil change interval requires the use of an infrared oil analysis program which shows the condition of the oil and its additives. For more information, consult your GM Truck dealer, who is an authorized CaterpillarR engine dealer. Transmission Capacity Capacities (volumes) shown are approximate. For manual transmissions, the correct oil level is to the bottom of the fluid fill plug opening. The oil capacity will vary, due to the angle of the transmission, with the vehicle. For automatic transmissions, see the Allison Automatic Transmission Operator’s Manual for oil check and maintenance information. Manual Transmission RT6609
RT6610
RTO6610. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pints (Liters) 12.0 (5.7) 12.0 (5.8) 12.0 (5.8)
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RT6613
RT7608LL RT8609
FS4205A, FS4205B, FS4205C 5205A, FS5205C FS5306
FS6305A, FS6305B FS6306
FS7206
T8607B Automatic Transmission AT542 (for oil pan filter change) AT545 (for oil pan filter change) MT643 (for oil pan filter change) MT653 (for oil pan filter change)16.0 (7.5) 19.5 (9.3) 15.0 (7.0) 12.5 (5.9) 12.5 (5.9) 18.0 (8.5) 19.0 (9.0) 19.5 (9.2) 20.0 (9.5) 36.0 (17.0) Pints (Liters) 30.0 (14.0)* 40.0 (19.0)* 13.0 (24.5)* 36.0 (17.0)*
. . . . . . . . . . . . . . . . . . . . . . . . . .
*Add two pints (one liter) when changing spin-on filter.
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Axle Lubricant Capacity Single Speed Axle 15040S 19060S 21060D 21060S 22060S 22080S 23080S 23431
23105S 26085P 26105S 30105S Two-Speed Axle 15040T 19060T 21060T 22060T 23080T 26080TLubricant, Pints (Liters) 21.0 (10.1) 28.0 (12.8) 28.0 (14.7) 28.0 (14.7) 28.0 (14.7) 40.0 (20.3) 40.0 (20.3) 40.0 (20.3) 48.0 (22.7) 41.0 (19.5) 48.0 (22.7) 46.0 (23.2) Lubricant, Pints (Liters) 24.0 (11.5) 35.0 (17.5) 35.0 (17.5) 35.0 (17.5) 39.0 (19.9) 41.0 (19.5)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Above capacities (volumes) are approximate.
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Tandem Axles DS344 (front) RS344 (rear) DS454 (front) RS454 (rear) DS404, DS404P (front) RS404 (rear) DT402P (front) RT402 (rear)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lubricant, Pints (Liters) 29.0 (15.1) 28.0 (13.2) 29.0 (15.1) 28.0 (13.2) 29.0 (15.1) 34.0 (16.1) 34.0 (16.1) 34.0 (16.1)
Above capacities (volumes) are approximate. Fuel Tank Capacity Model Standard Optional Optional Optional* Optional**
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gallons (Liters) 50 (189.0) 35 (132.5) 60 (227.1) 70 (264.0) 100 (378.0)
* Two 35-gallon (132 L) tanks **Two 50-gallon (189 L) tanks Above capacities (volumes) are approximate.
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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 dealer. Air Conditioning Refrigerant Capacity Refrigerant R-134a
. . . . . . . . . . . .
2.5 lbs. (1.134 kg)
Service Replacement Part and Filter Recommendations Engine RPO Spark Plug —Gap
7.2L LG5
— —This capacity (volume) is approximate. Normal Maintenance Replacement Parts Allison Transmission External Filters Engine 7.2L 7.4L
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GM (AC) Part Number 25011122 (PF897) 25011122 (PF897)
—Torque
—
Oil Filter PCV Valve Air Cleaner* Donaldson
CATR 2P4004
—Fuel Filter
P522606
AC-TP-915 Pri- mary** Pressure Caps RC-547.4L LP4/L21
AC Type R41-932
0.060 inch (1.52 mm) 22.0 lb. ft. (30.0 Nm) AC Type PF-932
AC Type CV-774C Donaldson P533355
AC Type GF-481—
Air Compressor Filter Air Compressor GM Part Number Bendix Tu-Flo 550 (13.2 CFM)
2467368
*Optional Davco (K28) D350921 spin-on type filter located in component box. **Optional Cold Weather (KUK) Racor B6484GM spin-on type located in component box. Optional Davco heated fuel water separator mounted on the side of the diesel engine.
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- NOTES
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Section 7 Scheduled Maintenance Services
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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
7-5Introduction Part A: Scheduled Maintenance Services Scheduled Maintenance
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7-28
7-31Part B: Owner Checks and Services Part C: Recommended Fluids and Lubricants Part D: Maintenance Record
7-
7-1
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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.
Have you purchased the GM Protection Plan? The Plan supplements your new vehicle warranties. See your Warranty and Owner Assistance booklet, or your GM dealer for details.
7-2
How This Section is Organized This maintenance schedule 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.
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 are skilled enough to do some work on your vehicle, you will probably want to get the service information. See “Service and Owner Publications” in the Index.
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“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: Recommended Fluids and Lubricants” lists some recommended products 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 D: 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.
7-3
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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 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 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 C. 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 use the recommended fuel. See “Fuel” in the Index. Scheduled Maintenance Supplements If your vehicle has a CaterpillarR diesel engine, your GM Owner’s Manual is supplemented by the CaterpillarR Diesel Engine Operation & Maintenance Manual. If your vehicle has an Allison transmission, your GM Owner’s Manual is supplemented by an Allison Transmission Operator’s Manual. Always refer to these manuals for related maintenance services.
7-4
Scheduled Maintenance The services shown in this schedule up to 100,000 miles (166 000 km) should be performed after 100,000 miles (166 000 km) at the same intervals. The services shown after 100,000 miles (166 000 km) should be performed at those same intervals. This vehicle has a computer that lets you know when to change your engine oil. This is not based on mileage, but on engine revolutions and engine operating temperature. When the computer has calculated that the oil needs changing, the Oil Life Indicator will indicate that a change is necessary. See “Footnotes” at the end of this Maintenance Schedule for further explanation of maintenance services and CaterpillarR diesel application. 100 Miles (160 km) j Wheel stud nut service. (45) 500 Miles (800 km) j Wheel stud nut service. (45) 1,000 Miles (1 600 km) j Wheel stud nut service. (45)(46)
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3,000 Miles (5 000 km) j Engine oil and filter service. (3)(9) j Check fluid levels (or every 3 months, whichever
occurs first). (1)(2)(6)
j Clutch pedal free travel service. (10) j Rear axle air shift motor service. (11) 6,000 Miles (10 000 km) j Engine oil and filter service. (3)(9) j Check fluid levels (or every 3 months, whichever
occurs first). (1)(2)(6)
j Chassis lubrication service (or every 6 months,
whichever occurs first). (12)
j Lubricate door hinge pins and rollers with engine oil. j Wheels and tires service. (15) j Hydraulic brake service (or every 6 months,
whichever occurs first). (7)
j Hydraulic parking brake service (or every 6 months,
whichever occurs first). (8)
j Clutch pedal free travel service. (10) 9,000 Miles (15 000 km) j Engine oil and filter service. (3)(9) j Check fluid levels (or every 3 months, whichever
occurs first). (1)(2)(6)
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12,000 Miles (20 000 km) j Engine oil and filter service. (3)(9) j Check fluid levels (or every 3 months, whichever
occurs first). (1)(2)(6)
j Chassis lubrication service (or every 6 months,
whichever occurs first). (12)
j Lubricate door hinge pins and rollers with engine oil. j Wheels and tires service. (15) j Hydraulic brake service (or every 6 months,
whichever occurs first). (7)
j Hydraulic parking brake service (or every 6 months,
whichever occurs first). (8)
j Engine drive belts service (or every 12 months,
whichever occurs first). (18)
j Clutch pedal free travel service. (10) j Throttle linkage service. (19) j Thermostatically controlled engine cooling
fan service. (4)(20)
j Shields and underhood insulation service. (4)(5)(21) j Check air brake relay valve operation and check for
leaks (or every month, or every 300 hours, whichever occurs first).
15,000 Miles (25 000 km) j Engine oil and filter service. (3)(9) j Check fluid levels (or every 3 months, whichever
occurs first). (1)(2)(6)
j Steering system service. (13) j Front and rear suspension service. (14) j Spring-to-axle U-bolts and shackle bolts service. (16) j Exhaust system service (or every 6 months,
whichever occurs first). (3)(4)(17)
j Air brake service (or every 6 months, whichever
occurs first). (39)
18,000 Miles (30 000 km) j Engine oil and filter service. (3)(9) j Check fluid levels (or every 3 months, whichever
occurs first). (1)(2)(6)
j Chassis lubrication service (or every 6 months,
whichever occurs first). (12)
j Inspect door hinge pins and bushings and replace as necessary. Lubricate door hinge pins and rollers with engine oil.
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j Replace air conditioning filter dryer (or every
18 months, whichever occurs first, and whenever refrigerant charge is lost for any reason).
j Wheels and tires service. (15) j Hydraulic brake service (or every 6 months,
whichever occurs first). (7)
j Hydraulic brake caliper service (or every 6 months,
whichever occurs first). (22)
j Hydraulic parking brake service (or every 6 months,
whichever occurs first). (8)
j Clutch pedal free travel service. (10) j Clean air brake application valve (or every 3 months,
or every 300 hours, whichever occurs first); lubricate linkage.
21,000 Miles (35 000 km) j Engine oil and filter service. (3)(9) j Check fluid levels (or every 3 months, whichever
occurs first). (1)(2)(6)
24,000 Miles (40 000 km) j Engine oil and filter service. (3)(9) j Check fluid levels (or every 3 months, whichever
occurs first). (1)(2)(6)
j Chassis lubrication service (or every 6 months,
whichever occurs first). (12)
j Lubricate door hinge pins and rollers with engine oil. j Wheel bearing (grease type) service (or every
24 months, whichever occurs first, and whenever hubs are removed). (23)
j Wheels and tires service. (15) j Hydraulic brake service (or every 6 months,
whichever occurs first). (7)
j Hydraulic parking brake service (or every 6 months,
whichever occurs first). (8)
j Engine drive belts service (or every 12 months,
whichever occurs first). (18)
j Clutch pedal free travel service. (10) j Throttle linkage service. (19) j Thermostatically controlled engine cooling
fan service. (4)(20)
j Shields and underhood insulation service. (4)(5)(21) j Air intake system service (or every 24 months,
whichever occurs first). (4)(5)(24)
j Thermostatically controlled air cleaner service
(or every 24 months, whichever occurs first). (3)(4)(25)[
