See also:

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 ...

Voice Pass-Thru
Voice pass&-thru allows access to the voice recognition commands on the cell phone. See your cell phone manufacturer's user guide to see if the cell phone supports this feature. To access ...

Infotainment
Determine which radio the vehicle has and read the following pages to become familiar with its features. WARNING Taking your eyes off the road for extended periods could cause a crash resulting in i ...