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:

    Radio(s)
    : Press to turn the system on and off. Turn to increase or decrease the volume. RADIO/BAND or SRCE: Press to choose between FM, AM, or XM™, if equipped. TUNE/MENU: Turn to select radio stations. ...

    Braking
    See Brake System Warning Light . Braking action involves perception time and reaction time. Deciding to push the brake pedal is perception time. Actually doing it is reaction time. Average reaction ...

    Driving Across an Incline
    Sooner or later, an off-road trail will probably go across the incline of a hill. If this happens, you have to decide whether to try to drive across the incline. Here are some things to consider: ...