See also:

Remote Keyless Entry (RKE) System
The RKE transmitter is used to remotely lock and unlock the doors from up to 60m (195 ft) away from the vehicle. : Press to unlock the driver door. Press again within three seconds to unloc ...

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 ...

Grade Braking (6-Speed Automatic Transmission)
The Grade Braking shift modes can be activated by pressing the button on the end of the shift control lever. While in Range Selection Mode, Grade Braking is deactivated allowing the driver to select ...