See also:

Limit Features While Driving
The navigation system may have this feature. Touch the Limit Features While Driving screen button to turn the ability to limit functions on and off while driving. When this screen button is highli ...

Add-on Electrical Equipment
The OnStar system is integrated into the electrical architecture of the vehicle. Do not add any electrical equipment. See Add-On Electrical Equipment. Added electrical equipment may interfer ...

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 ...