Chevrolet 2007 Colorado Owner's Manual page 210

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 and hold one of the six numbered
pushbuttons until a beep sounds. When
that numbered pushbutton is pressed,
the station that was set, returns.
5. Repeat Steps 2 through 4 for each
pushbutton.
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Setting the Tone (Bass/Treble)
AUDIO: To adjust bass or treble, press and
release AUDIO until BAS (bass) or TRE (treble)
displays. Then press and hold the
increase or to decrease the tone. If a station is
weak or has static, decrease the treble.
To adjust bass or treble to the middle position,
select BAS (bass) or TRE (treble). Then press and
hold AUDIO for more than two seconds until a
beep sounds. B (balance) and a zero or T (treble)
and a zero displays.
To adjust both tone controls and both speaker
controls to the middle position, first exit out
of audio mode by pressing another button,
causing the radio to perform that function or
wait five seconds for the display to return to
time of day. Then press and hold AUDIO for
more than two seconds until a beep sounds.
CEN (center) displays.
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