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 ...

Home Page Features
Various functions are disabled when the vehicle is moving. Press the Now Playing screen button to display the active source page. The sources available are AM, FM, XM (if equipped), CD, USB/iPod, a ...

Navigating Folders on an iPod or USB Device (Vehicles without a Navigation System)
1. Press and hold or while listening to a song until the contents of the current folder display on the radio display. 2. Press and hold to go back to the previous folder list. 3. Press and rel ...