2007 Lmm rebuilt motor, will not run

[Dvkansas]

I’m new here have racked my brain on this project for 3-4 weeks. Any information is greatly appreciated, about 3 years ago I was driving down the road and she went down on me the infamous crank had snapped I parked the truck in my shop and told myself I’d get to it at a later time, well about 2 months ago I tore her down put a Callie’s crank in. new main and rod bearing new push rods. ran valve lash 3-4 time to assure they were correct, had trouble with seating two injectors but got them back out and used one of my gun kits to clean the injector holes til they were spotless, and then reinstalled no issues there. Rail pressure currently at around 8500 psi.
Had some problems with the grounds on the motor, removed all grounds from engine and frame buffed and applied die electric grease to all of them and re assembled. Thoroughly went through every harness and checked for wear and re wrapped and applied new loom. Truck will only fire and not run, will fire up for 1 maybe 2 seconds and die. And sounds like a fuel knock. Ohmed out all injectors and read good, one code being thrown ckp sensor short to ground p0336, tore down front of truck again and replaced crank and cam sensor, only to the code coming back immediately and still not running, checked voltage at ckp sensor and I have 5v ground 5v with my signal wire dropping to .08 when I turn the motor over by hand and tracked the wire back to the ecm with the same reading there as well any help would be greatly appreciated

 

[2004LB7]

Make sure do didn't swap crank and cam sensors.

You might need a scanner that can read missed crank signal count. And lastly a scope that can show the cam and crank signals.

You might also want to inspect the reluctor wheels to see of they are loose or miss aligned

 

[Dvkansas]

I have a snap on Solis ultra, cam and crank sensor wires are hooked to the correct ones, can double check reluctor wheels today but I believe they are correct

 

[malibu795]

In To learning

 

[1FastBrick]

I have a snap on Solis ultra, cam and crank sensor wires are hooked to the correct ones, can double check reluctor wheels today but I believe they are correct

The sensors look Identical. You can not Physically tell them apart. A lot of people have mistakenly put the cam sensor in the crank sensor location and Vice Versa.

Make sure both signals read on the scan tool when you crank the motor over. If not, the may have been mixed up when you replaced them.

Were they GM sensors from a reputable source or aftermarket from the parts store?