1996 GMC 2500. Its the big 40 amp under the hood. I disconnected the ignition. Wire and hot wired a push button to start. It has not blown the ign 1 fuse yetq.

As if all previous issues. Arenot enough its cutting off again

I had a heck of a time getting all the air out of the fuel filter on the 6.5.
It caused it to occasionally die for no good reason. Usually happened shortly after start-up. If the batteries are good you could keep winding on it and it would start again, rev it to the moon and hope it got whatever air was trapped in the system out... The placement of the cartridge style filter leaves much to be desired. Kudos for the change in fuel filter placement on the 6.6.

When i replaced the injection pump last year i got rid of the pos fuel filter and installed a spin on fuel water separator filter. I also bought the new Stanadyne pmd and replaced the Pensacola diesel unit.

I am also attaching my pmd and heat sink to the grill guard on my truck. Its under the ranchhand and it might be getting hot.

Thought it might be the pmd with it cutting out. Ferm is def the one to ask.

check the ecm.... common issue on those is a rainwater leak onto the pcm under the dash... I had TWO friends with 6.5 suburbans replace multiple pmd's and pumps only to finally find an ecm full of water.