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:

    Display Settings
    Press the Config button on the Home Page or the CONFIG button on the faceplate, then select Display Settings from the list. The following options may display: Dimming Mode: Press to change the scre ...

    Storing a Flat or Spare Tire and Tools
    WARNING Storing a jack, a tire, or other equipment in the passenger compartment of the vehicle could cause injury. In a sudden stop or collision, loose equipment could strike someone. Store all th ...

    Cleaning Exterior Lamps/Lenses
    Use only lukewarm or cold water, a soft cloth and a car washing soap to clean exterior lamps and lenses. ...