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:

    Door Locks
    WARNING Unlocked doors can be dangerous. • Passengers, especially children, can easily open the doors and fall out of a moving vehicle. When a door is locked, the handle will not open it. The chan ...

    Tow/Haul Mode Light
    For vehicles with the Tow/Haul Mode feature, this light comes on when the Tow/Haul Mode has been activated. For more information, see Tow/Haul Mode on page 9‑42. ...

    Finding a Station
    BAND: Press to switch between AM, FM, or XM™, if equipped. (Tune): Turn to manually select radio stations. SEEK: Press to seek the previous radio station. Press and hold for a few seconds until ...