Chevrolet 2005 Astro Owner's Manual page 159

Set the volume at the desired level. Turn the control
ring behind the upper knob clockwise to increase
the SCV. Each notch on the control ring allows for more
volume compensation at faster vehicle speeds. Then,
as you drive, SCV automatically increases the volume,
as necessary, to overcome noise at any speed. The
volume level should always sound the same to you as
you drive. To turn SCV off, turn the control all the
way down.
Finding a Station
AM FM: Press this button to switch between FM1, FM2,
and AM. The display will show the selection.
TUNE: Press this knob lightly so it extends. Turn it to
select radio stations. Push the knob back into its stored
position when you are not using it.
o p
SEEK : Press the right or the left arrow to go to
the next or previous station and stay there.
To scan stations, press and hold either SEEK arrow for
two seconds until SCAN appears on the display. The
radio will go to a station, play for a few seconds, then go
on to the next station. Press either SEEK arrow again
to stop scanning.
The radio will only seek and scan stations with a strong
signal that are in the selected band.
P.SCAN (Preset Scan): Press this button and the
radio will go to the first preset station stored on
the pushbuttons, play for a few seconds then go on
to the next preset station. P.SCAN will appear on the
display. Press this button again or one of the
pushbuttons to stop scanning presets.
The radio will only scan the preset stations with a strong
signal that are in the selected band.
Setting Preset Stations
Up to 18 stations (six FM1, six FM2, and six AM), can
be programmed on the six numbered pushbuttons,
by performing the following steps:
1. Turn the radio on.
2. Press AM FM to select FM1, FM2, or AM.
3. Tune in the desired station.
4. Press AUTO TONE to select the equalization.
5. Press and hold one of the six numbered
pushbuttons. The sound will mute. When it returns,
release the pushbutton. Whenever that numbered
pushbutton is pressed, the station that was set
will return and the equalization that was selected will
be stored for that pushbutton.
6. Repeat the steps for each pushbutton.
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