2008 Cadillac Escalade EXT Owner's Manual - Page 273

Rear Side Window Antenna Your AM-FM antenna is located in the passenger rear side windows. Make sure the inside surfaces of the rear side windows are not scratched and that the lines on the glass are not damaged. If the inside surfaces are damaged, they could interfere with radio reception. Notice: Using a razor blade or sharp object to clear the inside of the rear side windows may affect radio reception or damage the rear window defogger. Repairs would not be covered by your warranty. Do not clear the inside of the rear side windows with sharp objects. Notice: Do not apply aftermarket glass tinting with metallic film. The metallic film in some tinting materials will interfere with or distort the incoming radio reception. Any damage caused to your antenna due to metallic tinting materials will not be covered by your warranty. Because this antenna is built into the rear side windows, there is a reduced risk of damage caused by car washes and vandals. If you choose to add an aftermarket cellular telephone to your vehicle, and the antenna needs to be attached to the glass, make sure you do not damage the grid lines for the AM-FM antennas or place the cellular telephone antenna over the grid lines. XM™ Satellite Radio Antenna System 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. Loading items onto the roof of your vehicle can interfere with the performance of the XM™ system. Make sure the XM™ Satellite Radio antenna is not obstructed. 3-109