My transfer case is toast - well, the viscous clutch, anyway.. I came across a GM Service Bulletin #067401 that describes the end of Borg-Warner 4472 transfer case exchange program. It refers to document #06-74-01R, but I dont know where to get a copy of that document. It seems definitely possible that the 4472 transfer cases had defective problems that GM would fix.
Anyone have any ideas?