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 illustrations 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 Filter Change

For the engine oil and filter changing procedure, refer to Engine Oil and Oil Filter Replacement in Engine Mechanical-3.5L or Engine Oil and Oil Filter Replacement in Engine Mechanical-4.0L.

For information on the correct engine oil quality and viscosity, refer to the following:

Gasoline Engine Oil Quality

Notice: Use only engine oil with the American Petroleum Institute Certified for Gasoline Engines starburst symbol. Failure to use the recommended oil can result in engine damage not covered by the warranty.


Object Number: 65538  Size: SH

The STARBURST symbol indicates that the oil has been certified by the American Petroleum Institute (API). Do not use any oil which does not carry the STARBURST symbol.

Gasoline Engine Oil Viscosity


Object Number: 65536  Size: MH

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.

SAE 5W-30 is the only viscosity grade recommended for your vehicle.

Use only oils which have the API Starburst symbol and which are also identified as SAE 5W-30.

If the temperature range is 0°F (-18°C) or above SAE 10W-30 oil which has the API Starbust symbol is acceptable if SAE 5W 30 oils is not available. Areas where the temperature falls below -20°F (-29°C), it is recommended either an SAE 5W-30 synthetic oil or and SAE 0W-30 oil. Both will provide easier cold starting and better protection for the engine at extremely low temperatures. Do not use other viscosity grade oils, such as SAE 10W-40 or SAE 20W-50 under any conditions.

Tire and Wheel Inspection and Rotation


Object Number: 105088  Size: SH

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

Accessory Drive Belt Inspection

Inspect the accessory drive belts for the following:

    • Cracks
    • Fraying
    • Wear
    • Proper tension

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

Automatic Transmission

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

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

Spark Plug Wire Inspection

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

Air Cleaner Filter Replacement

Replace the air cleaner filter according to the maintenance schedule intervals with the correct type. For maintenance schedule information, refer to Maintenance Schedule .