See also:

Unable to Connect to OnStar Message
If there is limited cellular coverage or the cellular network has reached maximum capacity, this message may come on. Push Q to try the call again or try again after driving a few miles into anoth ...

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 Climate Control System (Rear Climate Control Only)
A. Fan Control B. Temperature Control C. Air Delivery Mode Control For vehicles with the rear climate control system, the controls are located on the rear of the center console. The system can al ...