The guys on the Duramax site continue to have a problem with the fuel leak around a certain fitting. Not sure if the fitting is at fault, cross threaded, manufactured poorly or assembled wrong - but a problem. Not the comments about "all the stuff" in the way by Idle-Chatter:
http://www.62-65-dieselpage.com/ubb/Forum3/HTML/002320.html
http://www.62-65-dieselpage.com/ubb/Forum3/HTML/002320.html