GM Service Manual Online
For 1990-2009 cars only

The XM™ Satellite Radio antenna is located on the roof of your vehicle. Keep this antenna clear of snow and ice build up for clear radio reception.

If your vehicle has a sunroof, the performance of the XM™ system may be affected if the sunroof is open.

If the rear roof rack rail is too close to the XM™ antenna or if objects stored on the roof rack cover or block the XM™ antenna, the performance of the XM™ system may be affected.