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:

    Braking in Emergencies
    ABS allows the driver to steer and brake at the same time. In many emergencies, steering can help more than even the very best braking. ...

    Increasing Speed While Using Cruise Control
    If the cruise control system is already activated, . Press and hold the +RES button on the steering wheel until the desired speed is reached, then release it. • To increase vehicle speed in small a ...

    When the System Does Not Seem to Work Properly
    The following messages may be displayed on the DIC: SERVICE PARK ASSIST: If this message occurs, take the vehicle to your dealer to repair the system. PARK ASST BLOCKED SEE OWNERS MANUAL: This messa ...