2007 Hummer H3 Owner's Manual - Page 212

Playing the Radio P (Power): Press this knob to turn the system on and off. Turn this knob clockwise or counterclockwise to increase or to decrease the volume. DISP (Display): When the ignition is turned off, press this knob to display the time. For XM™ (if equipped), press the DISP knob while in XM™ mode to retrieve four different categories of information related to the current song or channel: Artist, Song Title, Category or PTY (program type), Channel Number/Channel Name. To change the default on the display, press the DISP knob until you see the desired display, then hold this knob for two seconds. The radio produces one beep and the selected display becomes the default. AUTO VOL (Automatic Volume): With automatic volume, the 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. Each higher 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. The volume level should always sound the same to you as you drive. NONE displays if the radio cannot determine the vehicle speed. To turn automatic volume off, press this button until AVOL OFF displays. Finding a Station BAND: Press this button to switch between FM1, FM2, AM, or XM1 or XM2 (if equipped). The display shows the selection. e (Tune): Turn this knob to select radio stations. 212