TTY Users

OnStar has the ability to communicate to the deaf, hard-of-hearing, or speech-impaired customers while in the vehicle. The available dealer-installed TTY system can provide in-vehicle access to all of the OnStar services, except Virtual Advisor and OnStar Turn-by-Turn Navigation.

    See also:

    Checking Things Under the Hood
    WARNING: An electric fan under the hood can start up and injure you even when the engine is not running. Keep hands, clothing, and tools away from any underhood electric fan. WARNING: Things t ...

    Running the Vehicle While Parked
    It is better not to park with the engine running. But if you ever have to, here are some things to know. WARNING: Idling a vehicle in an enclosed area with poor ventilation is dangerous. Engine ...

    Instrument Panel Brightness
    (Instrument Panel Brightness): This feature controls the brightness of the instrument panel lights. The knob for this control is located next to the exterior lamps control. Push the knob in a ...