2004 Cadillac XLR Owner's Manual - Page 186

Diversity Antenna System Your AM-FM antennas are located in the windshield and rear window. Be sure that the inside surfaces of the windshield and rear window 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. Also, for proper radio reception, the antenna connector located on the passenger's side top corner of the windshield and the antenna connector located on the driver's side top corner of the rear window need to be properly attached to the buttons on the glass. Notice: Do not try to clear frost or other material from the inside of the front windshield and rear window with a razor blade or anything else that is sharp. This may damage the rear window defogger grid and affect your radio's ability to pickup stations clearly. The repairs wouldn't be covered by your warranty. If, when you turn on your rear window defogger, you hear static on your radio station, it could mean that a defogger grid line has been damaged. If this is true, the grid line must be repaired. If you choose to add an aftermarket cellular telephone to your vehicle, and the antenna needs to be attached to the glass, be sure that you do not damage the grid lines for the AM-FM antennas or place the cellular telephone antenna over the grid lines. 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 backglass antenna due to metallic tinting materials will not be covered by your warranty. XM™ Satellite Radio Antenna System Your XM™ Satellite Radio antenna is located on the trunk of your vehicle. Keep this antenna clear of snow and ice build up for clear radio reception. 3-76