GM Service Manual Online
For 1990-2009 cars only

Your AM-FM antennas are located in the rear side windows. Be sure that 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 windshield or rear window may affect radio reception or damage the rear window defogger. Repairs would not be covered by your warranty. Do not clear the inside windshield or rear window 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 backglass antenna due to metallic tinting materials will not be covered by the vehicle warranty.

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.