Hi everyone.

I have a 2012 1500 LT with the 5.3 V8. Recently I've been having issues with the truck stalling. I've had a new Delphi fuel pump installed and a new AcDelco FSCM installed and programmed. The truck is now cranking, but not starting. The MIL is lit. My code scanner will recognize that there is a code, but it just reads N/A instead of giving me a number. I tested the connector to the control module with a voltage light and none of the wires lit up with either the key on or off, including the power wires. I tested all applicable fuses under the hood with the light, as well, and they are good. Has anyone had this issue? If so, what turned out to be the culprit? I figure I'm down to wiring or the ECM.

Thanks in advance!

 

I'm having the exact same problem with my 2012 GMC Sierra 5.3 flex fuel, did you find out what it was. I'm hoping you can help me out with the problem

 

The original post was in 2020 - the poster may not respond at all.

My first instinct is to try a different scanner. Many of the cheaper handheld scanners don’t have manufacturer specific code information, so they will display NA or some other kind of error message.

Go to a parts store that offers code reading.