Buick 1994 LeSabre Owner's Manual page 135

It turns the system on and off.
It controls the volume.
It tells
you
the time. (When the ignition is off, push
It allows you to hear the other side of a tape. (Press
When a radio is playing with the time displayed, the
the knob to display the time.)
the knob while a cassette is playing.)
radio station frequency will display if you push the
knob.
Balance
The BAL control behind the upper knob allows you to
balance the sound between the right and left speakers.
The Lower Knob
Turn the lower knob to tune radio stations. Push it to get
AM or FM.
Fade
The FADE control behind the lower knob moves the
sound between your front and rear speakers.
Seek
Pressing the SEEK button will cause the receiver to seek
the next higher station and stop.
Scan
When you press SCAN, the radio will go to the next
station and pause and keep doing that until you press
scan again. SCAN appears in the display.
Pushbuttons
The four pushbuttons let you return to favorite stations.
You can set the pushbuttons for up to fourteen stations
(7 AM and 7 FM).
Tune in the desired station.
Press the SET pushbutton. (The display will show
SET for about 5 seconds.)
0
Within 5 seconds, push one
of
the four pushbuttons.
Whenever you press that button, the preset station will
return.