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Re: 2003 Ram 3500 5.9L fuel pump conversion
Posted to HD/Fleet Forum on 3/6/2020 1 Reply

Hi Gary.

I too have done these conversions and have not done any reprogramming.

The factory retrofit I am familiar with converts the filter-mounted lift pump to an in-tank pump, and the ones I saw included a relay. The original pump was run directly from a... Login to read more.

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