98 chevy 1500

i have a 98 chevy 1500 v6 that has the symptoms of being out of gas or a failed fuel pump,however i have gas in the tank and the pump was replaced a few years ago and i have pressure in the lines. i replaced the coil and ignition module. all fuses are good. what could it be??? could it be the starting relay??? would the engine even turn over if that was bad?? i plugged a new plug in and i have spark.. i am very confused and the truck still wont start.. anybody have any ideas???? im all out

Ok you have strong blue spark at the plugs? 60-65 psi at the fuel rail?