Question about Thule 2001 GMC Yukon - SLT, with factory roof rails - Base Rack System

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I have a anti freeze leak in the back of my engine and it dont look like its coming from the rear freeze plug. Now what?

Could it be a head gasket leak just below the freeze plug and not a freeze plug? Since I do not see any leak from the rear freeze plug.

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I have seen a couple of these now with headgasket leaks to the outside of the block just as you describe. I solved them both with a stop-leak additive, not something I would normally use, but I really didn't want to pull the heads because the exhaust studs always break on these engines. I would find out for sure where the leak is before proceeding though. If it's a hose or frost plug, you'll have to repair it properly.

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