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 ...

Blank Display
This display shows no information. ...

Using the USB Port
For vehicles with a USB port, the connector is located in the instrument panel storage area. See Instrument Panel Storage on page 4‑1 for more information. Radios with a USB port can control a ...