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I got a 07.5 Duramax with lmm motor and when I crank my truck it starts up but cuts off no check engine lights nothing so I go and prime it back up and cranks and runs fine no misfires not nothing so I’m lost maybe you guys can help me
 

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If you have to prime it each time it shuts off, you are sucking air somewhere between your fuel tank and the filter head.

Since you aer new here this thread may be of interest:

 
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