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:
Video Screen Input Jack
Each video screen is equipped with a video input jack to allow video cables to
be connected from an auxiliary device such as a camcorder or a video game system.
This signal will override any video ...
Tow/Haul Mode
Tow/Haul assists when pulling a heavy trailer or a large or heavy load. The purpose of the Tow/Haul mode is to:
• Reduce the frequency and improve the predictability of transmission shifts.
• Pr ...
Checking Engine Oil
It is a good idea to check the engine oil level at each fuel fill.
In order to get an accurate reading, the vehicle must be on level ground.
The engine oil dipstick handle is a yellow loop. See Engi ...





