Hummer H2 2010 Owner's Manual page 265

If the ignition or radio is turned off with a CD in the
player it stays in the player. When the ignition or radio is
turned on, the CD starts to play where it stopped, if it
was the last selected audio source.
When the CD is inserted, the CD symbol displays. As
each new track starts to play, the track number displays.
The CD player can play the smaller 8 cm (3 in) single
CDs with an adapter ring. Full-size CDs and the smaller
CDs are loaded in the same manner.
Playing a CD (In Either the DVD or
CD Slot)
Insert a CD partway into the slot, label side up. The
player pulls it in and the CD should begin playing
(loading a disc into the system, depending on media
type and format ranges from 5 to 20 seconds for a CD,
and up to 30 seconds for a DVD to begin playing).
If the ignition or radio is turned off, with a CD in the
player, it stays in the player. When the ignition or radio
is turned on, the CD starts playing where it stopped, if it
was the last selected audio source. The CD is
controlled by the buttons on the radio faceplate or by
the RSA unit. See Rear Seat Audio (RSA) on
page 4 124 for more information. The DVD/CD decks,
(upper slot is the DVD deck and the lower slot is the CD
deck) of the radio are compatible with most audio CDs,
CD-R, CD-RW, and MP3s.
When a CD is inserted, the text label DVD or CD
symbol displays on the left side of the radio display. As
each new track starts to play, the track number displays.
The CD player can play the smaller 8 cm (3 in) single
CDs with an adapter ring. Full-size CDs and the smaller
CDs are loaded in the same manner.
Care of CDs and DVDs
If playing a CD-R, the sound quality can be reduced
due to CD-R or CD-RW quality, the method of
recording, the quality of the music that has been
recorded, and the way the CD-R or CD-RW has been
handled. Handle them carefully. Store CD-R(s) or
CD-RW(s) in their original cases or other protective
cases and away from direct sunlight and dust. The CD
or DVD player scans the bottom surface of the disc.
If the surface of a CD is damaged, such as cracked,
broken, or scratched, the CD does not play properly or
not at all. Do not touch the bottom side of a CD while
handling it; this could damage the surface. Pick up CDs
by grasping the outer edges or the edge of the hole and
the outer edge.
If the surface of a CD is soiled, take a soft, lint free cloth
or dampen a clean, soft cloth in a mild, neutral
detergent solution mixed with water, and clean it. Make
sure the wiping process starts from the center to
the edge.
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