See also:

Rear Vision Camera (RVC)
The vehicle may have a rear vision camera system. Read this entire section before using it. WARNING The RVC system does not display pedestrians, bicyclists, animals, or any other object located outs ...

Universal Remote System Operation
Press and hold the appropriate button for at least half of a second. The indicator light will come on while the signal is being transmitted. ...

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 communicat ...