See also:

Using Softkeys to Play a DVD-V (Video)
Once a DVD-V is inserted, the radio display menu shows several tab options for playback. Press the softkey located under any tab option during DVD-V playback. (Play/Pause): Press either the Play or ...

Exterior Lamps Off Reminder
For vehicles with a radio, a reminder chime sounds when the headlamps or parking lamps are manually turned on, the ignition is off, and a door is open. To disable the chime, turn the lamp off. ...

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 ...