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Re: 2007 LBZ Duramax Fuel Dilution
Posted to HD/Fleet Forum on 1/15/2021 2 Replies

Did they let the pump sit on the tester and watch for a static leak? A pump seal will fool people because it works good under pressure. As a vehicle is left to sit, it will relax and begin to seep as residual pressure wears off in the pump.

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