GMC 2006 Sierra - Manual (Page 265)

For XM™ (if equipped), press the INFO 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, Channel Number/Channel
Name.
To change the default on the display, press the INFO
knob until you see the display you want, then hold the
knob until the display flashes. The selected display will
now be the default.
AUTO VOL (Automatic Volume): With automatic
volume, the audio system will adjust automatically to
make up for road and wind noise as you drive by
increasing the volume as vehicle speed increases.
Set the volume at the desired level. Press this button to
select LOW, MEDIUM, or HIGH. AVOL will appear on the
display. Each higher setting will provide more volume
compensation at faster vehicle speeds. To turn automatic
volume off, press this button until AVOL OFF appears on
the display.
Finding a Station
BAND: Press this button to switch between FM1, FM2,
AM, or XM1 or XM2 (if equipped). The display will show
the selection.
o
TUNE
p
: Turn this knob to select radio stations.
©
SEEK
¨
: Press either the SEEK or the TYPE
arrows to go to the next or to the previous station and
stay there.
The radio will only seek stations with a strong signal
that are in the selected band.
©
SCAN
¨
: Press and hold either the SCAN or the
TYPE arrows for two seconds until SCAN appears on
the display and you hear a beep. The radio will go to a
station, play for a few seconds, then go on to the next
station. Press either the SCAN or the TYPE arrows again
to stop scanning.
To scan preset stations, press and hold either the SCAN
or the TYPE arrows for more than four seconds. PSCN
will appear on the display and you will hear a double
beep. The radio will go to a preset station, play for a
few seconds, then go on to the next preset station.
Press either the SCAN or the TYPE arrows again to
stop scanning presets.
The radio will only scan stations with a strong signal that
are in the selected band.
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