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:

    Exit Lighting
    The interior lamps come on when the key is removed from the ignition. They turn off automatically in 20 seconds. The lights do not come on if the dome override button is pressed in. ...

    Engine Drive Belt Routing
    ...

    Rear Audio Controller (RAC)
    The vehicle may have the Rear Audio Controller (RAC). Certain radio functions can be controlled with the RAC. or (Next/Previous): Press the up or down arrows to go to the next or to the previou ...