I have an 07 Silverado 1500 Crew-Cab Z71. It started throwing codes related to fuel pump a couple months ago. I’ve exhausted options to fix this including replacing the Fuel Pump, Fuel Pump Control Module, Fuel Pump Relay, cleaned grounds and reset ECM.


The truck continues to hesitate when accelerating (5mph - 45mph), idles rough, wants to shut off with fluctuating RPMs and my MPG has greatly decreased.


Does anyone have any other ideas? What are we missing???

 

inspect the wire harness for a short on the front drive shaft. had a few that had rubbed through causing multiple issues. Just a quick thought