I'm not sure if I'm allowed to post a torrent link (if not please delete), but for anyone that uses torrents heres a doco you might all be interested in.
National Geographic Megafactories documentary on the construction of the C6.
Shows the frame construction plant.
Shows the engine manufacture plant (detroit)
Shows the assembly plant (bowling green)
Quality is good and the file size is a bit over a gig. Duration 47 min