2002 Chevrolet Impala Owner's Manual - Page 180

AUTO VOL (Automatic Volume): With automatic volume, your audio system adjusts automatically to make up for road and wind noise as you drive. Set the volume at the desired level. Press this button to select LOW, MEDIUM or HIGH. AVOL will appear on the display. The volume level should always sound the same to you as you drive. Each higher volume setting allows for more volume compensation at faster vehicle speeds. Then as you drive, automatic volume increases the volume as necessary to overcome noise at any speed. NONE will appear on the display if the radio cannot determine the vehicle speed. If you don't want to use automatic volume, select OFF. DISP (Display): Pressing this knob will display the station being played or it will display the clock. Clock display is available with the ignition turned off. Finding a Station BAND: Press this button to switch between AM, FM1 and FM2. The display will show your selection. TUNE: Turn this knob to choose radio stations. SEEK : Press the right arrow to seek to the next or previous station and stay there. The radio will seek to stations with a strong signal only. The sound will mute while seeking. PSCAN (Preset Scan): Press and hold one of the arrows for more than two seconds and the radio will produce one beep. The radio will scan to the first preset station stored on your pushbuttons, play for a few seconds, then go on to the next preset station. Press one of the arrows or one of the pushbuttons again to stop scanning. SCAN will be displayed whenever the tuner is in the preset scan mode. The channel number (P1 through P6) will appear with the frequency. In FM mode, this function will scan through the current band such as FM1 or FM2. The radio will scan preset stations with a strong signal only. The sound will mute while scanning. A A " " 3-8