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:

    Horn
    Press near or on the horn symbols on your steering wheel pad to sound the horn. ...

    When the Light Is On Steady
    This indicates that one or more of the tires are significantly underinflated. A Driver Information Center (DIC) tire pressure message may also display. See Vehicle Messages  for more informati ...

    XM Categories (Radio with CD)
    XM stations are organized in categories. Removing or Adding Categories 1. Press the CONFIG button. Turn the Menu knob until Radio displays. Press SELECT or press Radio to display the radio ...