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I have a 2005 gmc 2500 hd 6 liter. It has an oil leak that appears after being on the highway. It spray's up onto the firewall above the valve cover on the passenger side. The valve cover gasket has been replaced. help!

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There is a plate on back of the engine that can leak, but it will appear like the oil pan or rear main seal is leaking. you will need to clean any residue off and then check it out.

Posted on Dec 20, 2010

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Posted on Jan 02, 2017

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