I suggest you add 5 gallons of diesel-- the gauges are sometimes off-- also I have heard of the pick-up straw breaking and sucking air, instead of fuel.
Pump the primer on the filter housing-- and open the bleeder to see if there is fuel. If you ran out of fuel, you will have to pump and crank, pump and crank-- repeat
You should also check for codes-- a cheap reader may be a good investment.
Crank position sensor-? Can be a number of things-- but start with the suggestions.
Chevy 04.5 LLY, 2X, shell, XDR, MikeL Heavy duty up-grade, 6spd, TransGo, deep pan, de-badged, 65 Gallon replacement Aero tank, LBZ-mp, Kennedy pump, shimmed, Pre-fuel filter, tow mirrors, BU cam, gauges, GPS, Sirius, bags, custom grille, fender vents, HD trans cooler- Curt front hitch, footwell lights, load lights, Studs, head gaskets.--- Jerry