My first GMT800, 01 2500HD LQ4

CPB

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View attachment 2855
I dont think this will work on the fuel line by the tank
And up by the engine, as i edited my previous question, i fear about fire risk.

do you know where the check valve is on the fuel pump assembly? If its on the bottom, then there could be a bad hose on the fuel pump module that goes from the check valve to the top. if its on the top, theres a chance you could fix it by removing from the tank and ensuring the sock is clean and the hose is in good shape and the outlet pipes arent leaking.
I've been able to press into that style of line on some other vehicles by repurposing a line flaring tool. Basically after cutting the rigid plastic line the tool can be used to press barbed or other style of fittings.

The check-valve is internal to the assembly from all the information I've seen. Mine flows perfectly, just doesn't work as a one-way anymore to prevent pressure drop during cranking.
 

AuroraGirl

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I've been able to press into that style of line on some other vehicles by repurposing a line flaring tool. Basically after cutting the rigid plastic line the tool can be used to press barbed or other style of fittings.

The check-valve is internal to the assembly from all the information I've seen. Mine flows perfectly, just doesn't work as a one-way anymore to prevent pressure drop during cranking.
pressure shouldnt drop during a lot cranking, the fuel pump is powered during cranking

What does a fuel pressure gauge say when you key on and then leave it on and just watch the gauge for a while?
 

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pressure shouldnt drop during a lot cranking, the fuel pump is powered during cranking

What does a fuel pressure gauge say when you key on and then leave it on and just watch the gauge for a while?
Correct, it shouldn't drop. However when the check-valve fails it will drop. It's a very common failure on these and unfortunately most end up just having to replace the entire unit to address the check-valve.
 

AuroraGirl

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i would advise checking out the thing before modifying your fuel line to put a check valve in
Plus, im pretty sure its not able to hold a column of fuel in the forward portion all the way to the rail from the tank
I could be wrong, theres no installation documents on dormans site, but to me , logically it would check valve with a volume of gas behind it rather than ahead of it
 

CPB

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i would advise checking out the thing before modifying your fuel line to put a check valve in
Plus, im pretty sure its not able to hold a column of fuel in the forward portion all the way to the rail from the tank
I could be wrong, theres no installation documents on dormans site, but to me , logically it would check valve with a volume of gas behind it rather than ahead of it
I can install in the required direction.

1747143088871.png
 

AuroraGirl

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I can install in the required direction.

View attachment 2865
I still think its sketchy. But if you want to try it, just make sure that if it were to pop apart, it doesnt have a spray path directly at the exhaust (install a tube or secure somewhere)

I also didnt mean about it being backwards but if it worked for them it might for you
 

CPB

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I still think its sketchy. But if you want to try it, just make sure that if it were to pop apart, it doesnt have a spray path directly at the exhaust (install a tube or secure somewhere)

I also didnt mean about it being backwards but if it worked for them it might for you
If that's the case I'll refrain from showing photos of other fuel systems in my fleet. Plus its on opposite side of the vehicle relative to exhaust.
 

AuroraGirl

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If that's the case I'll refrain from showing photos of other fuel systems in my fleet. Plus its on opposite side of the vehicle relative to exhaust.
lol you dont have to worry about anything, im just saying what comes to mind for me as what would be safe/wise lol

Snapchat-184459501.jpgSnapchat-1559163876.jpg

I myself have a check valve on a carbureted 350
 

AuroraGirl

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copies of the kryptonite ones but nice

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I went a few months without replacing my shocks (this is the driver side best i can tell...) and my driver side shock was 100% not shocking (it literally will stay where its stroked to and doesnt resist, but it squeaks)
The passenger side had a tiny bit of shock left

The jounce became deflected because of that extra stress

If your shocks are good they should be fine
 

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