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:

    Steering Wheel Controls
    For vehicles with audio steering wheel controls, some audio controls can be adjusted at the steering wheel. (Push to Talk): For vehicles with Bluetooth® or OnStar®, press to interact with th ...

    Engine Cooling When Trailer Towing
    The cooling system may temporarily overheat during severe operating conditions. See Engine Overheating on page 10‑18. ...

    What to Do with Used Oil
    Used engine oil contains certain elements that can be unhealthy for your skin and could even cause cancer. Do not let used oil stay on your skin for very long. Clean your skin and nails with soap ...