See also:

Passing
More passing distance is needed when towing a trailer. The combination will not accelerate as quickly and is longer so it is necessary to go much farther beyond the passed vehicle before returning to ...

Reading Lamps
For vehicles with reading lamps in the overhead console, press the button located next to the lamp to turn it on or off. The vehicle may also have reading lamps in other locations. To turn the lamps ...

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 ...