GM Service Manual Online
For 1990-2009 cars only

The following information covers the checks and services required to retain the safety, dependability, and emission control performance of the vehicle.

Make sure any necessary repairs are completed on time. Whenever any fluids or lubricants are added to the vehicle, make sure that they are the proper ones. Refer to Fluid and Lubricant Recommendations .

At Each Fuel Fill

It is important to perform these underhood checks at each fuel fill.

Engine Oil Level

Check the engine oil level and add the proper oil if necessary.

In order to select the proper fluids and lubricants, refer to Fluid and Lubricant Recommendations .

Windshield Washer Fluid Level

Check the windshield washer fluid level in the windshield washer reservoir and add the proper fluid, if necessary. Refer to Fluid and Lubricant Recommendations .

At Least Once a Month

Tire Inflation: Check tire inflation. Make sure the tires are inflated to the pressures specified on the Certification/Tire label located on the driver's door lock pillar. Refer to Vehicle Certification Label .

At Least Twice A Year

Restraint System Check

Make sure the safety belt reminder light and all of your belts, buckles, latch plates, retractors, and anchorages are working properly. Look for any other loose or damaged safety belt system parts. If you see anything that might keep a safety belt system from doing its job, have it repaired. Have any torn or frayed safety belts replaced.

Also look for any opened or broken air bag coverings, and have them repaired or replaced. (The air bag system does not need regular maintenance.)

Wiper Blade Check

Inspect wiper blades for wear or cracking. Replace the blade inserts that appear worn or damaged or that streak or miss areas of the windshield.

Air Cleaner Filter Restriction Indicator Check

This vehicle has an indicator on the engine that notifies the driver when the air cleaner filter is dirty and needs to be changed. Check indicator at least twice a year or when the oil is changed, whichever occurs first. Refer to Air Cleaner Element Replacement in Engine Controls. Inspect the air cleaner filter restriction indicator more often if the vehicle is used in dusty areas or under off road conditions.

Automatic Transmission Check

Inspect the automatic transmission fluid level; add if needed. Refer to Transmission Fluid Check in Automatic Transmission. A fluid loss may indicate a problem. Inspect the system and repair as needed.

At Least Once a Year

Key Lock Cylinders: Lubricate the lock cylinders with the recommended lubricant. Refer to Fluid and Lubricant Recommendations .

Lubricate all of the following areas:

Body Lubrication

    • Body door hinges
    • Body hood, safety lever, and latch
    • Fuel door
    • Rear compartment hinges
    • Rear compartment latches and locks
    • Instrument panel compartment hinges, latch, and lock cylinder
    • Console cover hinges and latch.
    • Seat hardware

More frequent lubrication may be required when exposed to a corrosive environment. In order to locate the proper lubricant, refer to Fluid and Lubricant Recommendations .

Starter Switch

    • Before you start, make sure you have enough room around the vehicle in case the vehicle jumps suddenly.
    • Firmly apply both the parking brake and the regular brake. Do not use the accelerator pedal, and be ready to turn off the engine immediately if it starts.
    • On automatic transmission vehicles, try to start the engine in each gear. The starter should work only in PARK (P) or NEUTRAL (N). If the starter works in any other position, the vehicle needs service.

Steering Column Lock

    • While parked, and with the parking brake set, try to turn the key to LOCK in each shift lever position.
    • With an automatic transmission, the key should turn to LOCK only when the shift lever is in PARK (P).

Parking Brake and Automatic transmission PARK (P) Mechanism Check.

Caution: When performing this check, the vehicle could begin to move. You or others could be injured and property could be damaged. Make sure there is room in front of the vehicle in case the vehicle begins to roll. Be ready to apply the regular brake at once, should the vehicle begin to move.

Follow this procedure to test the parking brake and automatic transmission PARK mechanism:

  1. Park on a fairly steep hill, with the vehicle facing downhill.
  2. Keep your foot on the hydraulic brake pedal.
  3. Set the parking brake.
  4. In order to check the parking brake:
  5. 4.1. Start the engine
    4.2. Place the transmission in NEUTRAL.
    4.3. Slowly remove foot pressure from the hydraulic brake pedal.
  6. In order to check the PARK (P) mechanism, follow steps 1-3 above then do the following:
  7. 5.1. Shift to PARK (P).
    5.2. Release all brakes.

Lap and Shoulder Belts Condition and Operation:

Inspect all of the following belt system components:

    • Webbing
    • Buckles
    • Latch plates
    • Retractors
    • Guide loops
    • Anchors

Replace the belt if the webbing has been cut or otherwise damaged.

Underbody Flushing Service

At least every spring, use plain water to flush any corrosive materials from the underbody. Take care to clean thoroughly any areas where mud and other debris can collect.