See also:

Cellular and GPS Antennas
Avoid placing items over or near the antenna to prevent blocking cellular and GPS signal reception. Cellular reception is required for OnStar to send remote signals to the vehicle. ...

High-Beam On Light
The high–beam on light comes on when the high-beam headlamps are in use. See Headlamp High/Low-Beam Changer for more information. ...

XM Categories
XM stations are organized in categories. Removing or Adding Categories (Radio with CD and Radio with Six-Disc CD Only) 1. Press the CONFIG button. 2. Press the softkey below the XM tab. 3. ...