GMC 2003 C4C042 Owner's Manual page 183

Playing a Cassette Tape
Your tape player is built to work best with tapes that are
up to 30 to 45 minutes long on each side. Tapes longer
than that are so thin they may not work well in this
player. The longer side with the tape visible should face
to the right. If the ignition is on, but the radio is off, the
tape can be inserted and will begin playing. If you hear
nothing but a garbled sound, the tape may not be in
squarely. Press the eject button to remove the tape and
start over.
While the tape is playing, use the VOL, AUDIO and
SEEK controls just as you do for the radio. The radio
will display UP if the top side of the tape is playing.
DN (Down) will appear if the bottom side is playing.
If you want to insert a tape while the ignition is off, first
press the eject button or the RCL knob.
If an error appears on the display, see "Cassette Tape
Messages" later in this section.
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1 PREV (Previous): Your tape must have at least
three seconds of silence between each selection for
previous to work. Press this pushbutton to go to the
previous selection on the tape if the current selection has
been playing for less than 3 seconds. If pressed when the
current selection has been playing from 3 to 13 seconds,
it will go to the beginning of the previous selection or
the beginning of the current selection, depending on
the position on the tape. If pressed when the current
selection has been playing for more than 13 seconds,
it will go to the beginning of the current selection.
Pressing this pushbutton multiple times will increase the
number of selections to be searched back, up to
Pressing the NEXT pushbutton will cancel the
selection(s).
2 NEXT: Your tape must have at least three seconds of
silence between each selection for next to work. Press
this pushbutton to go to the next selection on the tape.
Pressing this pushbutton multiple times in the next mode
will increase the number of selections to searched
forward. Pressing the PREV pushbutton will cancel
the selection(s).
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