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 ...

Exterior Mirrors
Exterior Mirrors Vehicles with outside power mirrors and foldaway mirrors have controls located on the driver door. 1. Press (A) or (B) to select the driver or passenger side mirror. 2. Press t ...

Navigation
OnStar navigation requires the Directions and Connections service plan. Push to receive directions or have them sent to the vehicle navigation screen. Destinations can also be forwarded to the vehic ...