Hummer 2007 H3 - Manual (Page 204)

For XM™ (if equipped), press the DISP button 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 button 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.
t SEEK u : Press and release the right or
the left arrow to go to the next or to the previous
station and stay there.
To scan stations, press and hold either arrow
for more than two seconds. SCN displays and the
radio produces one beep. The radio goes to a
station, plays for a few seconds, then goes to the
next station. Press either arrow again or one of
the pushbuttons to stop scanning presets.
To scan preset stations, press and hold either
arrow for more than four seconds. PSC displays
and the radio produces two beeps. The radio
goes to a preset station, plays for a few seconds,
then goes to the next preset station. Press
either arrow again or one of the pushbuttons to
stop scanning presets.
The radio only seeks and scans stations with a
strong signal that are in the selected band.
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