GM Service Manual Online
For 1990-2009 cars only

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

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

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

Engine Oil and Oil Filter Change

Replace the engine oil and the engine oil filter.

    • For vehicles equipped with an oil cooler, refer to Engine Oil and Oil Filter Replacement in Engine Mechanical.
    • For vehicles without an oil cooler, refer to Engine Oil and Oil Filter Replacement in Engine Mechanical.

Engine Oil Quality

Oils of the proper quality for the vehicle can be identified by looking for the STARBURST symbol. The STARBURST symbol indicates that the oil has been certified by the American Petroleum Institute (API), and is preferred for use in gasoline engines.

Engine Oil Viscosity


Object Number: 65536  Size: MH

Engine oil viscosity (thickness) has an effect on the fuel economy and the cold-weather operation (engine starting and oil flow). 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.

SAE 5W-30 is best for the vehicle. However, use 10W-30 if the outside air temperature is higher than -18°C (0°F). Do not use other viscosity oils, such as SAE 20W-50.

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.

Important: If the vehicle is operated in an area where the temperature falls below -29°C (-20°F), consider using a SAE 5W-30 synthetic oil or a SAE 0W-30. Both will provide easier cold starting and better protection for the vehicle's engine at extremely low temperatures.

Tire and Wheel Inspection and Rotation


Object Number: 105088  Size: SH

Rotate the tires to equalize the wear and obtain maximum tire life. Refer to Tire Rotation in Tires and Wheels.

Check the tires for abnormal wear or damage. If irregular or premature tire wear exists, refer to Tire Diagnosis - Irregular or Premature Wear in Tires and Wheels.

Passenger Compartment Air Filter Replacement

Replace the passenger compartment air filter. Refer to Passenger Compartment Air Filter Replacement in HVAC.

Brake System Inspection

Inspect brake lines and hoses for proper hook-up binding, leaks, cracks or chafing. Refer to Brake Hose Inspection in Hydraulic Brakes. Inspect disc brake pads for wear. Refer to Brake Pad Inspection in Disc Brakes. Inspect the rotors for poor surface condition. Inspect other brake system components, including the brake calipers and the parking brake. Check the parking brake adjustment. The brakes may need to be inspected more often if the customer's driving habits or conditions result in frequent braking.

Automatic Transmission Service

Change the transmission fluid and the transaxle fluid filter according to the maintenance schedule intervals. Use the proper fluids. For the fluid and filter changing procedure. refer to Automatic Transmission Fluid Filter and Seal Replacement in Automatic Transmission/Transaxle.

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

Drive Belt Inspection

Inspect the drive belt according to the maintenance schedule intervals.

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

Inspect the drive belt for the following:

    • Cracks
    • Fraying
    • Wear
    • Proper tension

Replace as needed. For drive belt replacement, refer to Drive Belt Replacement in Engine Mechanical.

Cooling System Service

Drain, flush and refill the cooling system with new coolant. Refer to Cooling System Draining and Filling in Engine Cooling.

Spark Plug Replacement

Replace the spark plugs according to the maintenance schedule intervals.

For the spark plug replacement procedure, refer to Spark Plug Replacement in Engine Electrical.

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

For information on the correct type of spark plug, refer to Maintenance Items .

Spark Plug Wire Inspection

Clean the spark plug wires and inspect for burns, cracks or other damage. Ensure that the fit between the spark plug wire boots at the spark plugs and at the coils is snug. Replace the spark plug wires as needed. Refer to Spark Plug Wire Harness Replacement in Engine Electrical.

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 Maintenance Schedule .

For information on the correct type of air cleaner filter, refer to Maintenance Items .

For air cleaner filter replacement procedure, refer to Air Filter Element Replacement or Air Cleaner Assembly Replacement in Engine Controls.