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:

    Roadside Assistance Program
    For U.S.-purchased vehicles, call 1-800-252-1112; (Text Telephone (TTY): 1-888-889-2438). For Canadian-purchased vehicles, call 1-800-268-6800. Service is available 24 hours a day, 365 days a year. ...

    English and Metric Unit Conversion
    To change the display units between English and metric units, see Driver Information Center (DIC) . ...

    Stoplamp,Taillamp, and Turn Signal Lamp
    Driver Side Shown, Passenger Side Similar A. Taillamp B. Turn Signal Lamp C. Stoplamp/Taillamp To replace any one of these bulbs: 1. Open the trunk. 2. Remove the push pins securing the trunk ...