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:

    Tire Sidewall Labeling
    Useful information about a tire is molded into its sidewall. The examples below show a typical passenger vehicle tire and a compact spare tire sidewall. Passenger (P-Metric) Tire Example (A) ...

    Exit Lighting
    The headlamps, taillamps, parking lamps, back-up lamps, and license plate lamps come on at night, or in areas with limited lighting, when the key is removed from the ignition. The dome lamps ...

    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. T ...