GM Service Manual Online
For 1990-2009 cars only

The AM-FM antenna is integrated with the rear quarter glass windows, located in the rear of the vehicle on the driver and passenger sides. Make sure that the inside surface of the rear windows are not scratched and that the grid lines on the glass are not damaged. If the inside surface is damaged, it could interfere with radio reception.

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.

Notice: Do not try to clear frost or other material from the inside of the rear quarter window with a razor blade or anything else that is sharp. This may affect your radio's ability to pick up stations clearly. The repairs wouldn't be covered by your warranty.

If static is heard on the radio, when the rear window defogger is turned on, it could mean that a defogger grid line has been damaged. If this is true, the grid line must be repaired.

If adding an aftermarket cellular telephone to your vehicle, and the antenna needs to be attached to the glass, make sure that the grid lines for the AM-FM antennas are not damaged. Make sure the cellular telephone antenna does not touch a grid line.