Potential Issues

Some OnStar services are disabled after five days. OnStar cannot perform Remote Door Unlock or Stolen Vehicle Assistance after the vehicle has been off continuously for five days. After five days, OnStar can contact Roadside Assistance and a locksmith to help gain access to the vehicle.

    See also:

    SUSPENSION MODE TOUR (CTS-V ONLY)
    This message will be displayed when touring mode is selected using the Magnetic Ride Control button in the center of the instrument panel. See Magnetic Ride Control for more information. ...

    Antilock Brake System (ABS) Warning Light
    For vehicles with the Antilock Brake System (ABS), this light comes on briefly when the engine is started. If it does not, have the vehicle serviced by your dealer. If the system is working nor ...

    Transmission Messages
    SERVICE TRANSMISSION This message displays if there is a problem with the transmission. See your dealer. SHIFT DENIED This message displays when using the Driver Shift Control (DSC) and a ...