Diagnostics

OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if the vehicle is equipped with the Tire Pressure Monitoring System. If a diagnostics check is needed between e-mails, push OnStar Additional Information , and an Advisor can run a check.

    See also:

    Engine Overheating
    The vehicle has several indicators to warn of engine overheating. You will find an engine coolant temperature gauge on the vehicle's instrument panel cluster. See Engine Coolant Temperature Gauge . ...

    Storing Button Memory Positions
    To save positions into Button Memory: 1. Adjust the driver seat, seatback recliner, and both outside mirrors to the desired driving positions. 2. Press and hold MEM (Memory) and “1” at t ...

    Using the Maintenance Schedule
    We at General Motors want to help you keep your vehicle in good working condition. But we do not know exactly how you will drive it. You may drive very short distances only a few times a week. O ...