2003 Hummer H2 Owner's Manual - Page 203

AM-FM with Cassette Tape and Compact Disc Player with Radio Data System (RDS) and Automatic Tone Control (BoseR) AUTO VOL (Automatic Volume): Your audio system monitors the noise inside your vehicle. To use automatic volume, press the AUTO VOL button until AVOL ON appears on the display. Then, automatic volume will automatically adjust the volume of your radio so that it always sounds the same to you. To turn the automatic volume off, press the AUTO VOL button until AVOL OFF appears on the display. DISP (Display): Press this button to switch the display between the radio station frequency and the time. Time 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. Playing the Radio PWR (Power): Press this knob to turn the system on and off. VOL (Volume): Turn this knob to increase or to decrease volume. TUNE: Turn this knob to choose radio stations. SEEK : Press the right or the left arrow to seek to the next or to the previous station and stay there. The radio will seek only to stations that are in the selected band and only to those with a strong signal. A " 3-11