GM Service Manual Online
For 1990-2009 cars only

Engine Oil and Oil Filter Change

Replace the engine oil and the engine oil filter.

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

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


Object Number: 105088  Size: SH

Passenger Compartment Air Filter Replacement

Replace the passenger compartment air filter.

Brake System Inspection

Inspect brake lines and hoses for proper hook-up binding, leaks, cracks or chafing. Inspect disc brake pads for wear. 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.

Air Cleaner Filter Inspection and Replacement

Inspect the air cleaner filter every 25 000 km (15,000 miles) if driving in dusty conditions. Replace if necessary. Replace the air cleaner filter every 50 000 km (30,000 miles). Replace more often under dusty conditions.

Automatic Transmission Service

Change the transmission fluid and the transmission fluid filter.

Drive Belt Inspection

Inspect the drive belt for sever cracks, fraying,wear and proper belt tension. Belts can have small cracks in individual ribs without affecting performance.

Fuel Tanks, Cap and Lines Inspection

Inspect the following components for damage or leaks:

    • Fuel tank
    • Fuel tank cap
    • Fuel lines
    • Fuel rail
    • Fuel injectors

Inspect the fuel tank cap seal for an uneven filler neck imprint and any damage.

Periodic replacement of the fuel filter is not required.

Cooling System Service

Drain, flush and refill the cooling system with new coolant.

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.

Spark Plug Replacement

Replace the spark plugs.