See also:

Add-on Electrical Equipment
The OnStar system is integrated into the electrical architecture of the vehicle. Do not add any electrical equipment. See Add-On Electrical Equipment. Added electrical equipment may interfer ...

Control Buttons
The buttons used to control the XM radio are: RADIO/BAND: Press to turn the radio on and choose between AM, FM, and XM, if equipped. SEEK / SEEK: Press to go to the previous or next channel. ...

Engine Heater
The engine coolant heater, if available, can help in cold weather conditions at or below −18°C (0°F) for easier starting and better fuel economy during engine warm-up. Plug in the coolant h ...