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:

    Radio(s)
    VOL/ : Press to turn the system on and off. Turn to increase or decrease the volume. RADIO/BAND: Press to choose between FM, AM, or XM™, if equipped. TUNE or TUNE/INFO: Turn to select radio sta ...

    Programming without a Recognized Transmitter
    United States owners are permitted to program a new transmitter to their vehicle when a recognized transmitter is not available. The Canadian immobilizer standard requires that Canadian own ...

    Tips and Troubleshooting Chart
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