2003 Chevrolet Avalanche Owner's Manual - Page 263

Cleaning the Video Screen Pour some isopropyl or rubbing alcohol on a clean cloth and gently wipe the video screen. Do not spray directly onto the screen and do not press too hard or too long on the video screen. DAB Radio Antenna System Your DAB antenna is located on the roof o your f vehicle. Keep this antenna clear of snow and ice build up for clear radio reception. If your vehicle is purchased in Canada and driven into the United States the DAB radio antenna system will not function. DAB radio reception is available in Canada only. Fixed Mast Antenna The fixed mast antenna can withstand most car washes without being damaged. If the mast should ever become slightly bent, you can straighten it out by hand. If the mast is badly bent, as it might be by vandals, you should replace it. Check occasionally to be sure the mast is still tightened to the cowl. If tightening is required, tighten by hand, then with a wrench one quarter turn. The performance of your DAB system may be affected if your sunroof is open. Loading items onto the roof of your vehicle can interfere with the performance of your DAB system. Make sure that the DAB antenna is not obstructed. XMTMSatellite Radio Antenna System Your XMTMSatellite Radio antenna is located on the roof of your vehicle. Keep this antenna clear of snow and ice build up for clear radio reception. The performance of your XMTMsystem may be affected if your sunroof is open. Loading items onto the roof of your vehicle can interfere with the performance of your XMTMsystem. Make sure that the XMTMsatellite antenna is not obstructed. 3-104