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:
Shifting out of Park
The vehicle is equipped with an electronic shift lock release system.
The shift lock release is designed to:
• Prevent ignition key removal unless the shift lever is in P (Park) with the shift lev ...
Park Tilt Mirrors
If the vehicle is equipped with memory mirrors, there is an option to have the
mirrors tilt down, when in R (Reverse), to more easily see the ground near the vehicle.
When the vehicle is shifted to ...
Tachometer
The tachometer displays the engine speed in revolutions per minute (rpm). ...