Chevrolet 2004 Impala Owner's Manual page 211

CLEAN: If this message appears on the display, the
cassette tape player needs to be cleaned. It will still play
tapes, but you should clean it as soon as possible to
prevent damage to the tapes and player. See Care
of Your Cassette Tape Player on page 3-93.
If the cassette is not playing correctly, for any other
reason, try a known good cassette.
If any error occurs repeatedly or if an error cannot be
corrected, contact your dealer. If you radio displays
an error message, write it down and provide it to
the dealer when reporting the problem.
CD Adapter Kits
It is possible to use a portable CD player with your
cassette tape player after activating the bypass feature
on your tape player.
To activate the bypass feature, use the following steps:
1. Turn the radio off.
2. Press and hold the TAPE CD button for five
seconds. READY will appear on the display,
indicating the feature is active.
3. Insert the adapter into the cassette slot. It will
power up the radio and begin playing.
The override feature will remain active until EJT is
pressed.
Playing a CD
Insert a CD partway into the slot, label side up. The
player will pull it in and the CD should begin playing. The
CD symbol will appear on the display. If you want to
insert a CD with the ignition off, first press the EJT
button or the DISPL knob.
If you turn off the ignition or radio with a CD in the
player, it will stay in the player. When you turn on the
ignition or the radio, the CD will start playing, where
it stopped, if it was the last selected audio source.
As each new track starts to play, the track number will
appear on the display.
The CD player can play the smaller 8 cm single CDs
with an adapter ring. Full-size CDs and the smaller CDs
are loaded in the same manner.
If playing a CD-R the sound quality may be reduced
due to CD-R quality, the method of recording, the quality
of the music that has been recorded, and the way the
CD-R has been handled. You may experience an
increase in skipping, difficulty in finding tracks, and/or
difficulty in loading and ejecting. If these problems occur
try a known good CD.
Do not add paper labels to CDs, they could get caught
in the CD player.
Do not play 3 inch CDs without a standard adapter CD.
If an error appears on the display, see "CD Messages"
later in this section.
3-89