So ive been building my LLY for a couple years now. Its been a slow process with all other projects going on. So im to the point now where im ready to fire it up. Made sure all the wires are secure, good grounds and good voltage. What i was told to do was to pull the fuel pump fuse and crank it to make sure there is oil throughout the motor and to the turbo. Once that is done put the fuse in and start it. WELL all didnt go as planned. The ignition key in the cab wont crank it over so i resorted to jump the starter with a screw driver just to turn if over. Counld't get oil to circulate to the top of the turbo so than i took the oil filter off, no oil. Had him crank with the filter off, no change. (and yes there is oil in the motor). Talked to some people and they said try starting it and run it for a few seconds to see if it builds oil pressure, seems sketchy to me but i gave it a whirl. Truck still didnt start after all that. SO it has me stumped. Hooked up the scanner to the OBDII, put all the info in and the scanner wasnt able to communicate with the truck. So im at a halt in the road here as to where to turn and what to fix or try next. Research says maybe the ECM just from sitting so long on dead batteries? I cant see how thats possible. This is all a new game to me now. Any advice with be helpful or where to turn next!