Hey everyone.
I have a 2012 1500 LT 5.3 V8
I recently started having trouble after the truck stalled out. Replaced the FSCM with a Dorman which fixed the problem for about 2 weeks. Long story short, I've replaced the fuel pump with a brand new Delphi and now have installed & programmed a new ACDelco control module. The ACDelco worked immediately after it was installed and programmed, but the problem came back less than 12 hours later after I started the truck and went to leave for work.
I tested the wiring harness to the control module and found no power is running to the module itself, whether the key is on or off. The truck is now at a crank/no start phase. Fuses are good and have been tested visually and with a test light to make sure.
Has anyone had this issue? If so, what was the culprit?
Thanks in advance!

 

sounds like its a fault in the wiring between the fuse and module.