[horse482]

Welcome to the forum. You have checked all of the components, but did you check for 12.6v power to the fuel pump? Do you have a good ground for the pump? Has the tranny been out of the truck? If the tranny has been out see if they pinched the power wires for the fuel pump in the cross member and frame. Also look at the plug that plugs in to the fuel pump and see if there has been any melting. There have been some problems and you can get repair plugs at a parts store.