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International Automotive Technicians Network
Re: LB7 Duramax dumping fuel
Posted to Technical Discussion Forum on 4/20/2023

The pump has a weep hole much like a water pump. While it is not impossible, it's not very likely the pump is responsible. It should leak outside the engine into the valley. We can bench test the pump and injectors if you want verification but most likely it'... Login to read more.