My truck stalled on the highway and would not start again i had been driving around for a few hours and stopped at my favorite fishing hole for a couple of hours  and left on my way home i drove for maybe 2 miles and it stalled it acted like it ran out of fuel I had to have it towed home I checked fule pressure at the  sherator valve had no pressure so I changed out the pump and still have no pressure I have checked the fuel filter it's fine what am I missing