2009 Pontiac G3 Owner's Manual - Page 173

Notice: Using a razor blade or sharp object to clear the inside rear window can damage the rear window antenna and/or the rear window defogger. Repairs would not be covered by the vehicle warranty. Do not clear the inside 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. Because this antenna is built into the rear window, there is a reduced risk of damage caused by car washes and vandals. 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 a cellular telephone to the vehicle, and the antenna needs to be attached to the glass, make sure that the grid lines for the AM-FM antenna are not damaged. There is enough space between the grid lines to attach a cellular telephone antenna without interfering with radio reception. Multi-Band Antenna Vehicles with OnStar® have a multi-band antenna that is located on the roof of the vehicle. The antenna is used for the AM/FM radio, OnStar® and the XM™ Satellite Radio Service System. Keep the antenna clear of obstructions for clear reception. If the vehicle has a sunroof, the performance of the AM/FM radio, OnStar®, and the XM system may be affected if the sunroof is open. 3-57