See also:

Reporting Safety Defects to General Motors
In addition to notifying NHTSA (or Transport Canada) in a situation like this, please notify General Motors. Call 1-800-GMC-8782 (1-800-462-8782), or write: GMC Customer Assistance Center P.O. Box ...

Connections
OnStar Hands-Free Calling allows calls to be made and received from the vehicle. The vehicle can also be controlled from a cell phone through the OnStar mobile app. See www.onstar.com for coverage map ...

Format
The radio can play.mp3 or .wma files that were recorded onto a CD-R or CD-RW disc. The USB port can play.mp3 and .wma files stored on a USB storage device as well as AAC files that are stored on an i ...