2005 Chevrolet TrailBlazer Owner's Manual - Page 186

AUTO VOL: Your system has a feature called Speed-Compensated Volume (SCV). With SCV, your audio system adjusts automatically to make up for road and wind noise as you drive. Set the volume at the desired level. Press AUTO VOL to adjust the SCV. AVOL will appear on the display. Each time you press AUTO VOL, another volume setting (LOW, MEDIUM, HIGH or OFF) will appear on the display. The volume level should always sound the same to you as you drive. Each volume setting allows for more volume compensation at faster vehicle speeds. NONE will appear on the display if the radio cannot determine the vehicle speed. If you don't want to use SCV, select OFF. Finding a Station AM FM: Press this button to switch between AM, FM1 and FM2. The display will show your selection. TUNE DISP: Turn this control to choose radio stations. Pressing this control will also display an RDS station frequency or program type when the radio is on. Pressing this control when the ignition is off will display the clock. SEEK PSCAN : To seek, press the right arrow to tune to the next station and the left arrow to tune to the previous station and stay there. To scan your preset stations, press and hold one of the arrows for more than two seconds. The radio will produce one beep. Use preset scan to listen to each of your favorite stations stored on your pushbuttons for a few seconds. The radio will scan through each of the stations stored on your pushbuttons, except those stations with weak reception. 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. A " 3-14