GM Service Manual Online
For 1990-2009 cars only

The following information covers the inspections and service procedures required to retain the safety, dependability, and emission control performance of the vehicle.

Complete the necessary repairs and procedures on time. Use only the recommended fluids and lubricants. Refer to Fluid and Lubricant Recommendations .

At Each Fuel Fill

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

Engine Oil Level

Inspect 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 .

Engine Coolant Level

Inspect the engine coolant levels and add the proper coolant mixture, if necessary. Refer to Fluid and Lubricant Recommendations .

Windshield Washer Fluid Level

Inspect 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

Verify that 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

Verify that the safety belt reminder light is working properly. Inspect the system for any loose or damaged parts. Repair or replace suspect components. Replace any torn or frayed safety belts.

Repair or replace open or broken air bag coverings. The air bag system does not need regular maintenance.

Lap and Shoulder Belts Condition and Operation:

Inspect all of the following seat belt system components:

    • The webbing
    • The buckles
    • The latch plates
    • The retractors
    • The guide loops
    • The anchors

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

Wiper Blade Check

Inspect the 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 determines when the air cleaner filter needs to be replaced. Inspect the indicator at least twice a year or when the engine oil is changed, whichever occurs first. Refer to Air Cleaner Element Replacement or 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 fluid if necessary. Refer to Transmission Fluid Check or Transmission Fluid Check in Automatic Transmission. Any fluid loss may indicate a problem. Inspect the system and repair the transmission as needed.

At Least Once a Year

Key Lock Cylinders

Lubricate the key lock cylinders with the recommended lubricant. Refer to Fluid and Lubricant Recommendations .

Body Lubrication

Lubricate all of the following areas. In order to determine the proper lubricant, refer to Fluid and Lubricant Recommendations .

    • The door hinges and the hardware
    • The hood hinges, the safety lever, and the latch
    • The fuel door hinge
    • The rear compartment hinges
    • The rear compartment latches and the locks
    • The instrument panel compartment hinges, the latch, and the lock cylinder
    • The console cover hinges and the latch
    • The seat hardware

More frequent lubrication may be required when the vehicle is exposed to a corrosive environment.

Starter Switch

Before you begin, verify that you have enough room around the vehicle in case the vehicle jumps suddenly.

    • Firmly apply both the parking brake and the hydraulic brake. Do not use the accelerator pedal. Be prepared to turn off the engine immediately if the engine starts.
    • For 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 requires immediate service.

Steering Column Lock

With the vehicle parked and 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.

Parking Brake and Automatic Transmission Park Mechanism Test

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

    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.

  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. Test the parking brake as follows:
  5. 4.1. Start the engine
    4.2. Place the transmission in NEUTRAL.
    4.3. Slowly remove the foot pressure from the hydraulic brake pedal.
  6. In order to test the park mechanism, follow steps 1-3 above then do the following:
  7. 5.1. Shift to PARK.
    5.2. Release all of the brakes.

Underbody Flushing

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