How does the fuel lift pump work in the 6.5L diesel?

Volume 2 Issue 1 - 6.2/6.5 Issues and Answers

Can you help me understand how the fuel lift pump works in the 6.5 turbodiesel GM trucks? I’ve talked with several knowledgeable mechanics and get as many answers. I’m confused!

You did not specify the year of your truck and there is a difference between the 1994-1995 and those built later.  In the 1994-1995 models, the lift pump...

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