GMC 1995 Suburban Owner's Manual page 180

Upper Knob (PWR-VOL)
-
The upper knob has these two functions:
Push it to switch the system on and off.
Turn it to control the volume.
SCV (Speed Compensated Volume)
-
Move the control ring behind the
upper knob clockwise to adjust the Speed Compensated Volume feature. As
you drive, this feature increases the volume to overcome noise at any
particular speed. Each clockwise position on the control ring allows more
compensation and at a faster rate.
AM/FM
-
Press this button to switch between AM, FM 1 and FM2. The
display will show what mode the receiver is in.
RCL (Recall)
-
Press this button to change between the clock and the radio
station frequency displayed when the radio is on. Also, press this button to
display the time when the ignition is off.
TUNE
-
Press lightly on the TUNE button to release it from its stored
position. Rotate the knob clockwise to increase frequency and
counterclockwise to decrease radio frequency. When done, press the knob
again to return it to its stored position.
Pushbuttons
-
The six pushbuttons let you return to favorite stations. To
set the pushbuttons for up to 18 favorite stations (6 AM, 6 FM 1 and 6 FM2):
1 . Tune in the desired station.
2. Press AUTO TONE to select the best setting for the type of station
chosen.
3. Press and hold one of the pushbuttons until sound returns
(approximately two seconds). Whenever you press that button, the
preset station will return.
Repeat these steps for each pushbutton.
SEEK
-
Press SEEK to cause the receiver to seek the next higher
station.
Press
4
SEEK to cause the receiver to seek the next lower station.
SCAN
-
Press and hold the center of the SEEK button to momentarily hear
each available station. Release the button when SCAN appears in the
display. The receiver will continue to scan and momenlarily stop at each
station until you press the center of the SEEK button again.
P. SCAN (Preset Scan)
-
Press this button to scan each preset pushbutton
station. The receiver will continue to scan and momentarily stop at each
station until you press either P. SCAN again or one of the six pushbuttons.
The AUTO SCAN setting for that preset button will also return. The
pushbutton number (Pl-P6) will appear momentarily just before frequency
is displayed.
3-20