Radio display no disc in cd - Alpine CHM-S630 6-Disc CD Changer

Get a CD cleaning disc to clean the optics. The tracking laser is much lower power that the reading laser.

https://www.google.com/search?q=cd+cleaning+disc

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You have a problem that no one else has encountered. Try running a DVD Disc cleaner in both devices.

https://www.google.com/search?q=2005+GMC+Yukon+XL+radio+displays+%22disc+check+in+process%22

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sounds like a dead laser

take it to a chevy dealership, you have an internal problem with the radio. or you can just yank it out and replace it with an after market radio.

Try removing the fuses for the radio and CD player for 10 seconds to reboot them.

There is an arm in/on the left side of the disc player. Most likely the spring inside it is broken. Leaving the arm in the pushed back position. Some times kids put coins in there also. This will cause things to happen, to include killing the radio and/or cd player.

Usually there is a hole in close to the cd slot, where a pin can be inserted in order to push out a cd manually or a similar manual override.
Which CD player/ radio are you using?

Subject: Radio With Six Disc CD Changer Does Not Recognize Loaded CD And Displays An "INITIALIZING" Message, CD Will Not Play, CD Cannot Be Ejected, Or Disc Icon Does Not Illuminate (Reprogram Radio)
Models:
2005-2006 Chevrolet Avalanche, Suburban, Tahoe
2005-2007 Chevrolet Colorado, Express, Silverado Classic, TrailBlazer
2005-2006 GMC Yukon, Yukon XL
2005-2007 GMC Canyon, Envoy, Savana, Sierra Classic
2005-2006 HUMMER H2 with Six Disc CD Changer Equipped Audio System (RPO UC6)
Condition
Some customers may comment on any of the following conditions:
• The CD loaded in the radio will not play.
• The CD loaded in the radio will not eject.
• The disc icon on the radio will not illuminate.
• The radio displays an "INITIALIZING" message for approximately 30 seconds after vehicle start up.
Important: Do not attempt to play CDs with paper labels on them in this CD player. The labels may warp or wrinkle and jam the CD player mechanism. Refer to the Compact Disc Care and Cleaning procedure (Document ID# 1656123) in SI for more information.
Technicians are to reprogram the radio with new operating software using the following procedure:
1. If the radio has a CD(s)2008 General will be necessary to reset the radio and remove them
before the radio is reprogrammed. Remove and reinstall the radio fuse to reset the radio and then eject the CD(s). If cycling the power to the radio does not allow the CD(s) to be removed, the radio may have another failure that will not be corrected by the reprogramming procedure that follows. Refer to the Diagnostic Starting Point - Entertainment procedure in SI to begin your diagnosis of this failure to eject CDs concern before reprogramming the radio.
2. Reprogram the radio using the Service Programming System (SPS) with the latest software available on TIS2WEB. Refer to the SPS procedures and the Radio Programming and Set procedure in SI for more information. As always make sure your Tech 2® is updated with the latest software version.
3. Verify proper operation of the radio and make sure that all CDs can be ejected.

Hope helps (remember to rate this).

try unplug cd player and reconct

i would say that your lense is dirty and yes cleaning it might help