chevy k1500 Vortec 5.7L won't start

I have a Chevy k1500 4x4 5.7 with a 350 vortex motor it will not start. I drove it home an parked it an went out of town for a week an came back an it would not start. I bought a new fuel pump, fuel filter, new tank, plugs & plug wires, checked fuel pressure an it was 70psi hooked computer thing an it read no codes. It turns over an acts like its trying to start but wont. A Guy said maybe the module or the regulator. Any help would be greatly appreciated. Thanks Jennifer & james :D

check to see if you have spark and fuel injector pulse since your fuel pressure should be good. If you checked the computer for codes was the tool you used able to see the coolant temp too? Did it match the ambient temp? What year is your vehicle?