I've got a 2004 GMC Yukon with the 6 disc
cd changer and mine was doing the same thing. I took the stereo out which wasn't bad at all. The dash cover pops right out and the stereo only had three bolts. I then took the top of the CD player off. There's one small bolt at the back of the stereo and then you just pop the top off with a screw driver as there are prongs holding it on. Then I took wire
cutters and cut the stuck CD's out. I only did this as a last resort before taking it to the dealership. I was a little suprised but that actually did the trick.