2006 Chevrolet Avalanche Owner's Manual - Page 252

XM™ Radio Messages (cont'd) Radio Display Message Unknown Condition Radio ID not known (should only be if hardware failure) Hardware failure Action Required 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, 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 and DVDs on page 3-107 for more information. If there is no apparent damage, try a known good CD. 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 instead. 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. 3-86