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:

    Disc Music Menu
    Press the SELECT knob to access the Disc music menu. Turn the SELECT knob to scroll, then press it to select any of the following category buttons on the MP3 music menu to display the corre ...

    Special Application Services
    • Severe Commercial Use Vehicles Only: Lubricate chassis components every 5 000 km/3,000 mi. • Have underbody flushing service performed once a year. ...

    Erasing Speed Memory
    The cruise control set speed memory is erased by turning off the cruise control or the ignition. ...