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:

    Navigation/Radio System
    Your vehicle may have a navigation radio system. The navigation system has built-in features intended to minimize driver distraction. Technology alone, no matter how advanced, can never replace ...

    What to Use
    WARNING! Adding only plain water or some other liquid to the cooling system can be dangerous. Plain water and other liquids can boil before the proper coolant mixture will. The coolant warni ...

    Playing a CD
    Insert a CD partway into the slot, label side up. The player pulls it in and the CD should begin playing. If the ignition or radio is turned off while a CD in the player it stays in the player. W ...