2003 GMC Sierra 1500 Pickup Owner's Manual - Page 280

Care of Your CD and DVD Player The use of CD lens cleaner discs is not advised, due to the risk of contaminating the lens of the CD optics with lubricants internal to the CD mechanism. DAB Radio Antenna System Your DAB antenna is located on the roof of your vehicle. Keep this antenna clear of snow and ice build up for clear radio reception. 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. If your vehicle is purchased in Canada and driven into the United States the DAB radio antenna systemwill not function. DAB radio reception is available in Canada only. Chime Level Adjustment The radio is the vehicle chime producer. To change the volume level, press and hold pushbutton 6 with the ignition on and the radio power off. The chime volume level will change from the normal level to loud, and LOUD will be displayed on the radio. To change backto the default or normal setting, press and hold pushbutton 6 again. The chimelevel will change from the loudlevel to normal, and NORMALwill be displayed. Each time the chime volume is changed, three chimes will sound as an example of the new volumeselected. Removing the radio and not replacing it with a factory radio or chime module will disable vehicle chimes. 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. XMTM Satellite 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. 3-125