2003 Chevrolet Impala Owner's Manual - Page 213

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 XM system may be affected if your sunroof is open. Vehicle Customization Settings Your audio system can be used to control vehicle customization settings using the DISP button when the radio is off. See Vehicle Personalizationon page 2-45 for more information. 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 back to the default or normal setting, press and hold pushbutton 6 again. The chime level will change from the loud level to normal, and NORMAL will be displayed. Each time the chime volume is changed, three chimes will sound as an example of the new volume selected. Removing the radio and not replacing it with a factory radio or chime module will disable vehicle chimes. 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. 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. The performance of your DAB antenna may be affected if your sunroof is open. 3-90