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:
Arming the System
To arm the system:
1. Open the door.
2. Lock the door with the
transmitter. The security light
should come on and stay on.
3. Close all doors. The security
light should go off after about
3 ...
Before Driving
The RSE is for rear seat passengers only. The driver cannot safely view the
video screen while driving.
In severe or extreme weather conditions the RSE system may not work until
the temperature i ...
Tire Designations
Tire Size
The following is an example of a typical passenger vehicle tire size.
(A) Passenger (P—Metric) Tire:
The United States version of a metric tire sizing system.
The letter P as ...