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Please list all mods on your LB7
(y)
 

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The Duramax wire harness is known for issues.
Inspect every inch of your engine harness for rubbed through wire insulation, rodent damage, corrosion, loose connections, bent pins in the connectors, broken wire, etc
 

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Now she runs after outing the wiring harness back on but…. Now I wiggled it and it shut off
Short to ground issue within the harness.. Go back through and reinspect
 
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