2000 GMC C3500 not if fuel pump is out

Do below to determine if its fuel or spark problem

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, coil's resistances, distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it

Do you hear the fuel pump come on for 2secs if so were right back to Sq1 checking the fuel pressure to rule out the fuel filter, fuel pressure regulator and fuel pump-The fuel pressure should be 60-66psi. Now no fuel pump come on within that time -Check the ECM B fuse 20amp and fuel pump relay. Report back your findings