See also:

High-Beam On Light
This light comes on when the high-beam headlamps are in use. See Headlamp High/Low-Beam Changer for more information. ...

Problems with Route Guidance
Inappropriate route guidance may occur under one or more of the following conditions: You have not turned onto the road indicated. Route guidance may not be available when using automatic rerout ...

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 acces ...