GM Service Manual Online
For 1990-2009 cars only

The following text and illustrations describe the details of the required scheduled maintenance services.

For the time and/or the mileage intervals of scheduled maintenance items, refer to Maintenance Schedule .

For information on the proper fluids and lubricants to use refer to Fluid and Lubricant Recommendations .

Engine Oil and Filter Change

Change both the engine oil and the filter according to the maintenance schedule intervals.

For the time and/or the mileage intervals of scheduled maintenance items refer to Maintenance Schedule .

Engine Oil Quality

Oils recommended for the vehicle can be identified by looking for the STARBURST symbol. This symbol indicates that the oil has been certified by the American Petroleum Institute (API).


Object Number: 325071  Size: MH

Engine Oil Viscosity

Notice: Using oils of any viscosity other than those recommended could result in engine damage. When choosing an oil, consider the range of temperatures the vehicle will be operated in before the next oil change. Then, select the recommended oil viscosity.

The recommended oil viscosity for all vehicles when the temperature is above 0°F (-18°C) is SAE 10W-30.

Engine oil viscosity (thickness) has an effect on the fuel economy and the cold-weather operation (starting and oil flow) of a vehicle. Lower viscosity engine oils can provide better fuel economy and cold-weather performance. However, higher temperature weather condition require higher viscosity engine oils for satisfactory lubrication. When the temperature will be very cold and never above 60°F (16°C), SAE 5W-30 should be used in all models. If the vehicle will be in an area where the temperature falls below -20°F (-29°C), consider using either an SAE 5W-30 synthetic oil or an SAE 0W-30 oil. Both will provide easier cold starting and better protection at extremely low temperatures. Do not use other viscosity oils.

Chassis Lubrication

Notice: Do not lubricate the parking brake cables. Lubrication destroys the plastic coating on the cable.

Lubricate the transaxle shift linkage. Lubricate the parking brake guides, the underbody contact points, and the linkage.

Important: Wipe off dirt from the grease fittings before lubricating the joints. Ball joints should not be lubricated unless their temperature is -12°C (10°F) or higher. During cold weather, the ball joints should be allowed to warm before being lubricated. Use a low-pressure grease gun on all joints to prevent seal damage.

Apply grease slowly to the tie rod ends (1) while watching the grease seal. Apply grease until grease is seen bleeding from the seal. If the seal expands but no grease is seen, do not apply any more grease. Allow time for the grease to bleed from the seal.

Tire and Wheel Inspection and Rotation

Check the tires for abnormal wear or damage. Rotate the tires to equalize the wear and to obtain the maximum tire life.


Object Number: 105088  Size: SH

Accessory Drive Belt Inspection

Inspect the accessory drive belts for the following:

    • Cracks
    • Fraying
    • Wear
    • Proper tension

Replace the accessory drive belt as needed. (Belts can have many small cracks in the individual ribs without affecting the performance).

Transmission Service

Change both the fluid and the filter according to the maintenance schedule intervals.

For the time and/or the mileage intervals of scheduled maintenance items refer to Maintenance Schedule .

For information on the proper fluids and lubricants to use refer to Fluid and Lubricant Recommendations .

Spark Plug Replacement

Replace the spark plugs according to the maintenance schedule intervals.

For the time and/or the mileage intervals of scheduled maintenance items refer to Maintenance Schedule .

Spark Plug Wire Inspection

Clean the spark plug wires and inspect the wires for burns, cracks, or other damage. Test the wire boot fit at the coils and at the spark plugs. Replace the spark plug wires as needed.

Air Cleaner Filter Replacement

Replace the air cleaner filter according to the maintenance schedule intervals.

For time and/or mileage intervals of scheduled maintenance items refer to Maintenance Schedule .

Fuel Tanks, Cap and Lines Inspection

Inspect the following components for damage or leaks:

    • The fuel tank
    • The fuel cap
    • The fuel lines
    • The fuel rails
    • The fuel injection assemblies

Inspect the fuel cap gasket for an even filler neck imprint and any damage. Replace any parts as needed.

Periodic replacement of the fuel filter is not required.