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:

    Transmission Messages
    DIFFERENTIAL HOT, REDUCE SPEED (CTS-V ONLY) This message displays and a chime sounds if the differential fluid temperature exceeds 150°C (300°F). Driving aggressively or at high speeds can ...

    Front Display
    The front display is located in the instrument panel in the center of the speedometer and has four bars to provide distance and system information. The following describes how the UFRPA front ...

    Memory Features
    On vehicles with the memory package, memory buttons 1 and 2 on the driver door are used to save and recall memory settings for the driver seat cushion and seatback, outside mirrors, and th ...