Customer Assistance for Text Telephone (TTY) Users (U.S. and Canada)
To assist customers who are deaf, hard of hearing, or speech impaired and who use Text Telephones (TTYs), GMC has TTY equipment available at its Customer Assistance Center. Any TTY user can communicate with GMC by dialing:
1-800-462-8583. TTY users in Canada can dial 1-800-263-3830.
See also:
Highway Hypnosis
Always be alert and pay attention to your surroundings while driving.
If you become tired or sleepy, find a safe place to park the vehicle and rest.
Other driving tips include:
• Keep the vehicle ...
Dual Automatic Climate Control System
Dual Automatic Climate Control System
A. Driver and Passenger Temperature Controls
B. Fan Control
C. AUTO
D. Defrost
E. Air Recirculation
F. Outside Air
G. Air Delivery Mode Control
H. Dis ...
When the Light Flashes First and Then Is On Steady
If the light flashes for about a minute and then stays on, there may be a problem with the TPMS. If the problem is not corrected, the light will come on at every ignition cycle.
See Tire Pressure Mon ...





