GMC 1996 Sonoma Owner's Manual page 123

Setting the Tone
Playing a Compact Disc
Insert a disc partway into the slot, label side up. The
radio will pull the disc the rest of the way in. Wait a
few seconds and the disc should play.
I f the disc comes back out and/or ERR appears on
the display:
0
You are driving on a very rough road. (The disc
should play when the road gets smoother.)
BASS: Press the BASS up arrow to increase bass and
the BASS down arrow to decrease bass. Press the center
of the button for the factory-preset bass position. The
bass level will be displayed for about 10 seconds
whenever this button is pressed.
TREB: Press the TREB up arrow to increase treble and
the TREB down arrow to decrease treble. Press the center
of the button for the factory-preset treble position. The
treble level will be displayed for about 10 seconds
whenever this button is pressed.
Adjusting the Speakers
BAL: This control ring behind the POWER-VOL knob
adjusts the balance between the left and right speakers.
Balance will be displayed briefly when using this control.
FADE: This control ring behind the TUNE knob adjusts
the
balance between the front and rear speakers. Fade
levels will be briefly displayed.
0
The disc is upside down.
0
I t is dirty, scratched or wet.
0
It is very humid. (If so, wait about a n hour and
try again.)
The disc player is too hot to play the disc. (As soon
as things get back to normal. the disc should play.)
Turn the POWER-VOL knob to turn the system on.
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