Guess I need to be added to the list....................
Just got back from the dealer and need my head replaced as well. Don't have the VIN handy but I have an early year too so I guess my VIN falls into the early group. My experience is identical to everyone else, started running rough then the engine light came on. Called Onstar and they told me it was a misfire code and I needed to get it to the dealer. Brought it by today and he knew what to expect so he quickly put in on the computer to test and it came back bad head. Told me OK to drive it while they order the parts. Told me they've done about a dozen already and have 4 more in the hopper they are waiting to do. Said they've been pretty good getting the parts and usually have it done in a day and a half. I was keeping my fingers crossed mine was going to slip by.................
29,500 miles, auto, bought 11/05.
Time to call GM to see about them extending the warranty.....