See also:

Rear Audio Controller (RAC)
The vehicle may have the Rear Audio Controller (RAC). Certain radio functions can be controlled with the RAC. or (Next/Previous): Press the up or down arrows to go to the next or to the previou ...

Vehicle Personalization (With DIC Buttons)
The vehicle may have customization capabilities that allow you to program certain features to one preferred setting. Customization features can only be programmed to one setting on the vehicle and can ...

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 ...