I'm new to the forum guys, so be gentle. I have a 2001 GMC Sierra 2500HD Duramax. Its been running great. It has 72K miles on it. The other day it started rather hard and I smelled fuel. I looked under the truck and noticed a rather huge flow of fuel coming down from around the bellhousing. I shut it off and the leak stopped after a few minutes. When I started it again it started leaking again. I cant see where its coming from. Nothing visible from the top and I cant see where it originates from the bottom. Does the fuel line and return line go over the back of the engine?