Buick 2002 LeSabre Owner's Manual page 178

Push and release AUDIO until TREBLE appears on the
display. Then turn the AUDIO knob clockwise to
increase treble. TREBLE and a positive number will
appear on the display. Turn the AUDIO knob
counterclockwise to decrease treble. TREBLE and a
negative number will appear on the display. TREBLE
and a zero will appear on the display when the treble
level is set to the middle position. Stop turning the knob
when you find the treble level you want or when the
maximum or minimum level is reached. If a station is
weak or noisy, you may want to decrease the treble.
To adjust bass, midrange or treble to the middle
position, select BASS, MID or TREBLE. Then push and
hold AUDIO for more than two seconds until you hear a
beep. BASS and a zero, MID and a zero or TREBLE
and a zero will appear on the display. To adjust both
tone controls and both speaker controls to the middle
position, end out of audio mode by pushing the AUDIO
knob until the display goes blank. Then push and hold
AUDIO for more than two seconds until you hear a
beep. ALL CENTERED will appear on the display.
Adjusting the Speakers (Balance/Fade)
AUDIO: To adjust the balance between the right and
left speakers, push and release AUDIO until BAL
appears on the display. Then turn the AUDIO knob
clockwise to move the sound to the right speakers or
counterclockwise to move the sound to the left speakers.
A bar graph with indicators will show how the sound is
balanced between the right and left speakers. Stop
turning the AUDIO knob when you find the speaker
balance you want or when the maximum or minimum
level is reached.
To adjust the fade between the front and rear speakers,
push and release AUDIO until FADE appears on the
display. Then turn the AUDIO knob clockwise to move
the sound to the front speakers or counterclockwise to
move the sound to the rear speakers. A bar graph with
indicators will show how the sound is balanced between
the front and rear speakers. Stop turning the AUDIO
knob when you find the speaker balance you want or
when the maximum or minimum level is reached.
3-21