GMC 2004 Savana Van Owner's Manual page 173

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 allow 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 will appear on the display if the
radio cannot determine the vehicle speed. If you do not
want to use automatic volume, select OFF.
DISP (Display): Press this knob to switch the display
between the radio station frequency and the time.
Time display is available with the ignition turned off.
For RDS, press the DISP knob to change what appears
on the display while using RDS. The display options
are station name, RDS station frequency, PTY, and the
name of the program (if available).
To change the default on the display, press the DISP
knob until you see the display you want, then hold
the knob for two seconds. The radio will produce one
beep and the selected display will now be the default.
Finding a Station
BAND: Press this button to switch between FM1, FM2,
or AM. The display will show your selection.
TUNE: Turn this knob to select radio stations.
q r
SEEK : Press the right or the left arrow to go 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.
q r
SCAN : Press and hold either arrow for
more than two seconds. SCAN will appear on the
display and you will hear a beep. The radio will go to a
station, play for a few seconds, then go on to the
next station. Press either arrow again to stop scanning.
To scan preset stations, press and hold either arrow
for more than four seconds. PSCN will appear on
the display and you will hear two beeps. The radio will
go to the first preset station, play for a few seconds,
then go on to the next preset station. Press either arrow
again or one of the pushbuttons to stop scanning.
The radio will scan only to stations that are in the
selected band and only to those with a strong signal.
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