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:
Instrument Panel Overview
A. Air Vents .
B. Headlamp High/Low-Beam Changer.
Turn and Lane-Change Lever. See Turn and Lane-Change Signals . Driver Information
Center (DIC) Buttons. See Driver Information Center (DIC) .
...
Navigation
This display is used for the OnStar
or Navigation System Turn-by-Turn
guidance. See OnStar Overview or the navigation manual,
if the vehicle has navigation, for
more information. ...
Tire Pressure Light
For vehicles with the Tire Pressure
Monitor System (TPMS), this light
comes on briefly when the engine is
started. It provides information
about tire pressures and the TPMS. ...