I can't find that old thread either but I did save the link when it was posted.
However, it didn't work for me then and it doesn't work for me now. Good Luck!
http://www.gmbuypower.com/nvlWindowSticker.bp?print=True&VIN=insert VIN here
Glad to hear your build date was moved forward jo! You really did mean
SEPT 30th on that other thread right???