GMC Envoy Owner's Manual page 250

Radio Display
Message
Radio ID
Unknown
Chk XMRcvr
Playing a CD
If the ignition or radio is turned off, with a CD in the
player, it will stay in the player. When the ignition
or radio is turned on, the CD will start playing where it
stopped, if it was the last selected audio source.
When a CD is inserted, the CD symbol will appear on
the display. As each new track starts to play, the
track number will appear on the display.
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.
XM™ Radio Messages (cont'd)
Condition
Radio ID label
(channel 0)
Radio ID not known
(should only be if
hardware failure)
Hardware failure
Action Required
If tuned to channel 0, this message will alternate with the
XM™ Radio eight digit radio ID label. This label is needed
to activate the service.
If this message is received when tuned to channel 0, there
may be a receiver fault. Consult with your GM dealer.
If this message does not clear within a short period
of time, your receiver may have a fault. Consult with
your GM dealer.
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. There may be 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.
If an error appears on the display, see "CD Messages"
later in this section.
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