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:

    Programming Transmitters to the Vehicle
    Only RKE transmitters programmed to this vehicle will work. If a transmitter is lost or stolen, a replacement can be purchased and programmed through your dealer. When the replacement transmitter is ...

    Compass Zone Setting
    This display allows for setting the compass zone. See Compass on page 5‑6 for more information. ...

    Headlamp Aiming
    The headlamp aiming system has been preset at the factory. If the vehicle is damaged in an accident, the aim of the headlamps may be affected and adjustment may be necessary. It is recommended tha ...