IF A CD IS STUCK IN THE IN DASH 6 DISC CHANGER OF A AVALANCHE, CAN YOU REMOVE IT AND IT STILL WORK?

It is possible to be able to remove one, but the mechanism in there is very delicate. You need to very care full in doing so. Another question is your vehicle still under warranty, your could always to your dealership to be fixed. If it out of warranty, there are many repair places all over the country that repair radios , or possibly a local car audio shop close to where you live may do that kind of work also. I hope this helps and good luck.