Quote Originally Posted by Southernmost View Post
So I have a 2002 Silverado 1500HD with the 6.0. Had a terrible oil leak that was coating the underside of the vehicle. I was told by several shops that it was the rear main seal. Took it to a buddy's place and he put it up on a lift while running and found something like an oil galley plug that uses a 3/8 in Allen wrench had backed out until about 2 threads were left. Was an extremely tight fit. He basically cut the end of an Allen wrench off and used a box wrench to tighten it. Was above the oil cooler and leaking down the oil filter on the back of the engine mostly on the drivers side. Just something to consider...

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Everyone forgets there is a gasket for that. They do go bad over time.....