Pontiac 2007 G5 Owner's Manual page 201

When a CD is inserted, the CD symbol displays
on the CD. As each new track starts to play,
the track number displays.
The CD player can play the smaller 3 inch (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 can 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. There can be an
increase in skipping, difficulty in finding tracks,
and/or difficulty in loading and ejecting. If these
problems occur, check the bottom surface of the
CD. If the surface of the CD is damaged, such as
cracked, broken, or scratched, the CD will not play
properly. If the surface of the CD is soiled, see Care
of Your CDs on page 216 for more information.
If there is no apparent damage, try a known
good CD.
Notice: If you add any label to a CD, insert
more than one CD into the slot at a time,
or attempt to play scratched or damaged CDs,
you could damage the CD player. When
using the CD player, use only CDs in good
condition without any label, load one CD at a
time, and keep the CD player and the loading
slot free of foreign materials, liquids, and
debris.
Do not add any label to a CD, it could get caught in
the CD player. If a CD is recorded on a personal
computer and a description label is needed, try
labeling the top of the recorded CD with a
marking pen.
If an error displays, see "CD Messages" later in
this section.
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