See also:

Customer Assistance Offices (U.S. and Canada)
GMC encourages customers to call the toll-free number for assistance. However, if a customer wishes to write or e-mail GMC, the letter should be addressed to: United States GMC Customer Assistance ...

Adjusting the Speakers (Balance/Fade) (AM-FM Radio and AM-FM Radio with CD)
To adjust the balance or fade: 1. Press or press the knob until the speaker control label displays. 2. To adjust the setting, do one of the following: • Turn the knob. • Press either SEEK ...

Adjustable Throttle and Brake Pedal
On vehicles with this feature, you can change the position of the throttle and brake pedals. No adjustment to the pedals can be made when the vehicle is in R (Reverse) or while using cruise control. ...