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:

    CD/DVD
    To select tracks on a CD/DVD: Press and release or to go to the next or previous track. ...

    Battery
    This display shows the current battery voltage. If the voltage is in the normal range, the value will display. For example, the display may read BATTERY 13 VOLTS. Your vehicle's charging system regul ...

    Rear Window Defogger
    The rear window defogger uses a warming grid to remove fog from the rear window. (Rear Window Defogger): For vehicles with this feature, press to turn the defogger on or off. It automatically turns ...