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:

    Floor Mats
    WARNING If a floor mat is the wrong size or is not properly installed, it can interfere with the pedals. Interference with the pedals can cause unintended acceleration and/or increased stopping d ...

    Setting Preset Stations
    To store presets: 1. Tune to a radio station. 2. Press and hold one of the six numbered pushbuttons for three seconds until a beep sounds. 3. Repeat Steps 1 and 2 to store additional radio stations ...

    Horn
    Press on the steering wheel pad to sound the horn. ...