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:
Engine Coolant Heater
The engine heater can provide easier starting and better fuel economy during engine warm-up in cold weather conditions at or below −18°C (0°F). Vehicles with an engine heater should be plugged ...
Theft-Deterrent Feature
The theft-deterrent feature works by learning a portion of the Vehicle Identification
Number (VIN) to the infotainment system. The infotainment system does not operate
if it is stolen or moved to ...
Transfer Case
Refer to the Maintenance Schedule to determine how often to check the lubricant
and when to change it. See Maintenance Schedule on page 11‑3. ...