Loc: Fort Lauderdale, FL
That truck has no fuel pump but the high pressure pump itself. Sucks it out of a pumpless tank.
Big question is, when he pumped it up, did he bleed the fuel out through the on-engine bleeder?
That thing needs a computer scan like nobody's business.
Those symptoms leading to a no-start make me first thing of fuel. Secondly, a close second, they make me think of a dead FICM. Not unheard of.
In the middle of the two is chafing of the FICM harness where it passes over that metal bracket near the alternator.
Start by making sure it was pumped up and bled from the engine mounted bleed, then see if it starts. If it doesn't, scan the computer and see what it has to say. That particular engine generally throws a bunch of codes when something that catastrophic goes on.
Its likely an LLY duramax if its an 05. If it did in fact go into a reduced power scenario then it has a code in it. Thats the first place to start. Everything other than that is just a WAG. If its fuel related my first move would be to rebuild or replace the fuel filter head, start with the cheap and easy stuff.
How many miles are on it and does it have any tuners ?
On my TDI, ive problems with the anti shudder valve sticking closed or partially closed, so this starves the engine of air, or will not allow it to start. I just had to clean it all out at the entrance to the manifold, no problems since.
2002 VW Golf TDI-Mobil 1 5/40 TDT 2005 BMW M3 BMW Twin Power 10/60 1998 BMW M3/4/5 Fuchs 5/40 2007 Mercedes GL320 CDI Fuchs 5/40 GT Pro XTL
Mine had similar symptoms from a collapsed plastic fuel line under the truck and a fuel filter head (housing/mount) that was leaking air. No fuel leaks were visible as it is under suction and not pressure. The o rings in the filter head were not holding a prime in the fuel system. Oreillys had the filter head rebuild kit for ~$22.
06 GMC 2500HD DMAX EFILIVE M1 TDT 5w-40 FRAM Ultra 91 GMC K1500 5.7L 5w-30 Quaker State HM Bosch D+ 72 Nova 350 SBC 74mm AirWerks Turbo 15w-40 HDEO