I have a 1996 Chevrolet Silverado K1500 that.

I have a 1996 Chevrolet silverado K1500 that will simply not run. I have replaced the ignition coil, ignition module, ecm, fuel pump, battery, and spark plugs. When I tried to start it the engine would only turn over and over. Went to make sure the fuel pump worked I had unscrewed the line to make sure gas was going though and there was but after having replaced the fuel filter it still managed to give the same results. Just to make sure I took the line off again to see if it was getting gas and there was no gas in the lines. So where do I go from here?