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I've got a full kit, NOS. Listed in the classifieds. Please keep me in mind.

How much vacuum does the pump need to pull?

Parts? labor? Both?

Varies by state. Generally trailers are not nearly as much trouble as trucks. And few trucks are as much trouble as HMMWVs.

Inside the wheel well to inside the wheel well and outside edge to outside edge.

Are two 51R's sufficient to run the glow plugs and then crank an M998?

I didn't remove the sock. I see no compelling reason to alter the fuel system from stock at this point. I cleaned the tank and the sock, dumped the contaminated fuel, and applied biocide to prevent recurrence. I plan to proactively open and reinspect the tank to see if there's any...

Agreed. I was biased in favor of the lift pump due to a similar experience with an M936A2 that was the lift pump. And a buddy's M923 where we dropped the tank and thoroughly cleaned it, and the dirty tank was not the culprit. Again, thanks everyone who contributed.

Your first post, and your diagnosis was spot on. Thanks for the input and welcome to the site!

You told me so. If i had done this, I would not have replaced the lift pump.

RESOLVED! IT WAS THE SOCK! I drove It 7mi each way to the fuel station and filled it, after cleaning the tank. I've been driving this truck since 2017. Never a hiccup until now. I suspect there was life in the tank. The fuel had not been sitting , but was nearly opaque green. (My...

Keep the factory filter to catch anything missed by the first filter. Make the first filter spin on and rather coarse.

What kind of funds do I need to set aside to make that happen?

Note the difference between the ones made for deuces and the ones made for 5tons.

I like that idea as well...

I like this idea. I was considering exactly that. Big coarse filter upstream from the lift pump. Keep the factory filter as well. With both, I'd be concerned about resistance to flow and worry the one pump is insufficient to force fuel through both.

Color is distorted. It isn't black. It's hard to get the camera and the light in at the same time.

So here's what i see looking into the tank from the fuel gauge sending unit hole. Upper left is return as best I can tell, and center is the pickup. I'm concerned about that ring on the return. Whats up with that? What's to prevent me from addressing the sock by means of dumping fuel in the...

Remember when @TNDRIVER said it wasn't the lift pump? Yeah, he was right. It acted normal for 2 miles, then exactly the same symptoms. Back on the Strap for the Tow of Shame it went. Made it back to the driveway.

Picture of the box with the part number of the pump I'm using. There's no vent on the top of it, and the inlet is facing 180* off. These are the two differences compared to the pump I removed. I ordered this one. Had I put eyes on it, I would have bought one that was an exact match.