Once a Year

• Starter switch check. See Owner Checks and Services.

• Parking brake and automatic transmission P (Park) mechanism check. See Owner Checks and Services.

• Automatic transmission shiftlock control system check. See Owner Checks and Services.

• Ignition transmission lock check. See Owner Checks and Services.

• Engine cooling system and pressure cap pressure check. Radiator and air conditioning condenser outside cleaning. See Cooling System.

• Exhaust system and nearby heat shields inspection for loose or damaged components.

• Accelerator pedal check for damage, high effort, or binding. Replace if needed.

• If the vehicle has a Tire Sealant and Compressor Kit, check the sealant expiration date printed on the instruction label of the kit. See Tire Sealant and Compressor Kit.

    See also:

    OnStar®
    OnStar® uses several innovative technologies and live advisors to provide a wide range of safety, security, navigation, diagnostics, and calling services. ...

    Winter Tires
    Consider installing winter tires on the vehicle if frequent driving on snow or ice covered roads is expected. All season tires provide good overall performance on most surfaces, but they may not offer ...

    Power Windows and Other Power Options
    Circuit breakers in the rear fuse block protect the power windows and other power accessories. When the current load is too heavy, the circuit breaker opens and closes, protecting the circuit un ...