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11 2500hd fuel feed issue- upfitted work truck.


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Posted

I have an upfitted 2011 chevy 2500hd 6.0 gas motor auto trans. I have voltage coming out of my fuel pump relay. It is working as it should. I have no voltage to the gray wire at the fuel pump. Seems likely that it could be a problem with the fuel pump control module but I can not locate the module. Not on left frame rail nor around where spare tire would be if this truck had one. Is it possible this truck does not have one? If so any ideas where to check further? This is my work truck so please if anyone has any idea would be greatly welcomed

Posted

Looking at all data says the fuel pump control module is integrated into the trailer brake control module? Please tell me this is not true lol.

Looking at all data says the fuel pump control module is integrated into the trailer brake control module? Please tell me this is not true lol.

Posted

On the HD gas L96 trucks, they don't use a Fuel Pump Flow Control Module like the 1500 series did those years. The HD trucks, the ECM is in control of the fuel pump. Gray wire to the pump goes relay, to 25amp fuse, Fuse #20, then direct to the fuel pump.

 

I'd check that gray wire and look for any breaks in the wiring, and check if you have power at the fuel pump fuse.

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