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Discussion Starter · #1 ·
Hey there I have an 07 Lbz driving down the road it just shut off. I have been getting fuel rail pressure too low and would go into limp mode I can reset it on tuner and it would be fine now however it won’t run unless I am hitting the primer constantly
 

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2017, 2500HD, LTZ, front guard, Duraflap mudguards, Leer bed topper
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867 Posts
Don’t start changing things until you have tried to find the cause..
Last filter change?
There are chances the base where the fuel filter attaches can be bad…
Air in the line from the tank to pump and or filter.
Remove fuel cap. Still run? Bad cap… or vent line..

Is truck clean enough to check..are any hoses “damp” from fuel?

let’s see whatcha got…
 

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Discussion Starter · #3 ·
I’ve rebuilt the filter head changed the fuel filter seems to still loose prime though so today I’m gonna get a new filter head and lines and pressurize the tank with a vacuum thanks for any suggestions
 

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2017, 2500HD, LTZ, front guard, Duraflap mudguards, Leer bed topper
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867 Posts
I’ve rebuilt the filter head changed the fuel filter seems to still loose prime though so today I’m gonna get a new filter head and lines and pressurize the tank with a vacuum thanks for any suggestions
How about filling in your truck info in your profile…

There is a “fuel line flush procedure” fuel line rotted out, alternative?

basically, find the fuel return line, disconnect carefully, attach a long hose and clamp just enoug to not leak.. do not damage the return line. Run the hose into a catch basin. Turn truck “on” and pump should move fuel.
 
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