Sounds like your fuel pump went out or you either have a stopped up fuel filter. To try to check if your fuel pump is working, go to a quiet area, put the key into the ignition and turn the key on to where the lights inside light up. Dont turn on or turn over the truck. When you turn the key on, if you listen carefully, you should hear your fuel pump turn on for about 2 seconds, then it cuts off. try this a couple of times and if you dont hear it, then most likely its your fuel pump. Or maybe your fuel filter is just REALLY stopped up. good luck