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:

    Climate Controls
    The heating, cooling, and ventilation in the vehicle can be controlled with this system. Climate Control with Cooled and Heated Seats shown A. Driver and Passenger Temperature Controls B. AUTO ...

    Brake System Warning Light
    With the ignition on, the brake system warning light comes on when the parking brake is set. If the vehicle is driven with the parking brake engaged, a chime sounds when the vehicle speed is great ...

    SERVICE TIRE MONITOR SYSTEM
    This message displays if a part on the Tire Pressure Monitor System (TPMS) is not working properly. The tire pressure light also flashes and then remains on during the same ignition cycle. Se ...