See also:

Satellite Radio Antenna
The XM Satellite Radio antenna is located on the roof of the vehicle. Keep the antenna clear of obstructions for clear radio reception. If the vehicle has a sunroof, the performance of the XM syste ...

Compass Zone
Your dealer/retailer will set the correct zone for your location. If the zone is not set to your location or you drive out of the area, the variance needs to be changed to the appropriate zone. ...

General Information
For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people. Genuine GM parts have one of these marks: ...