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:

    Fog Lamps
    Use the fog lamps for better vision in foggy or misty conditions. The ignition must be in RUN for the fog lamps to work. The fog lamp button is located on the instrument panel to the right of ...

    Storing an XM Channel as a Favorite
    Channels from all bands can be stored in any order in the favorite pages. Up to six channels can be stored in each favorite page and the number of available favorite pages can be set. Storing a Ch ...

    Loss of Control
    Let us review what driving experts say about what happens when the three control systems—brakes, steering, and acceleration—do not have enough friction where the tires meet the road to do what the ...