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.

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    Language — English/Metric
    To change the language of the navigation screens or to change the navigation screens from English or metric, see Driver Information Center (DIC)   for more information. ...