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:
Roadside Assistance Program
For U.S.-purchased vehicles, call 1-800-252-1112; (Text Telephone (TTY): 1-888-889-2438).
For Canadian-purchased vehicles, call 1-800-268-6800.
Service is available 24 hours a day, 365 days a year.
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English and Metric Unit Conversion
To change the display units between English and metric units, see Driver Information
Center (DIC) . ...
Stoplamp,Taillamp, and Turn Signal Lamp
Driver Side Shown, Passenger Side Similar
A. Taillamp
B. Turn Signal Lamp
C. Stoplamp/Taillamp
To replace any one of these bulbs:
1. Open the trunk.
2. Remove the push pins securing the trunk ...