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:
Trailer Sway Control (TSC)
Non-hybrid vehicles with StabiliTrak have a Trailer Sway Control (TSC) feature.
If the vehicle is towing a trailer and the system detects that the trailer is swaying,
the vehicle brakes are applie ...
Roadside Service (U.S. and Canada)
U.S.: 1-800-224-1400
Canada: 1-800-882-1112.
Text Telephone (TTY) Users (U.S. Only): 1-888-889-2438.
Service is available 24 hours a day, 365 days a year. ...
Entering the Personalization Menus
1. Press CONFIG to access the Configuration Settings menu.
2. Turn the MENU/SELECT knob to highlight Vehicle Settings.
3. Press the center of the MENU/SELECT knob to select the Vehicle Settings
men ...