Chevrolet 2007 Express 2007 Express Owner's Manual page 194

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 you hear a beep.
Whenever that numbered pushbutton is
pressed, the station that was set returns.
5. Repeat the steps for each pushbutton.
Setting the Tone (Bass/Treble)
AUDIO: To adjust the bass or the treble, press
and release the AUDIO button until BAS (bass)
or TRE (treble) appears on the display. Then press
and hold the up or the down arrow to increase
or to decrease. If a station is weak or has static,
decrease the treble.
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To adjust bass or treble to the middle position,
select BAS or TRE. Then press and hold the
AUDIO button for more than two seconds until you
hear a beep. B and a zero or T and a zero
appears on the display.
To adjust both tone controls and both speaker
controls to the middle position, first end out
of audio mode by pressing another button, causing
the radio to perform that function, or by waiting
five seconds for the display to return to the time of
day. Then press and hold the AUDIO button for
more than two seconds until you hear a beep.
CEN (center) appears on the display.
Adjusting the Speakers (Balance/Fade)
AUDIO: To adjust the balance between the
right and the left speakers, press and release the
AUDIO button until BAL (balance) appears on
the display. Then press and hold the up or
the down arrow to move the sound toward the
right or the left speakers.