See also:

Roof Rack System
The roof rack cross rails can be locked in four positions along the roof rack side rails. Lift the lever to release and move the cross rail. Push the lever down to completely engage into the side ...

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 ...

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 ...