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International Automotive Technicians Network
Re: 2007 LBZ Duramax Fuel Dilution
Posted to HD/Fleet Forum on 1/14/2021

I had an 04 3500 Duramax a couple years ago that was doing the same thing and I checked everything thoroughly, no weak or skipping cylinders, balance test showed nothing, and put UV dye in the fuel, pulled the valve covers off and hooked the fuel lines back up... Login to read more.