99 Chevy Silverado 5.3 vortex will stay running / Now will not run.

Hey everyone! My beautiful truck will not run!
       OK until Yesterday this truck has run awesome!  Till yesterday it had
never not started! We've done regular tuneup's, oil changes, etc. etc. etc.
       Yesterday I left home  and a mile down the road it started to stahl. like it
wasn't getting enough gas, or it was flooding.  If I would push the gas pedal
down Further it would stall even worse. I stopped and looked at everything   
Started it back up and drove a block, then parked for about 5 minutes.  As it
sat idling it completely died, and would not start again.
       I was thinking fuel filter,  because when I first turn the key, right over to
just before starting the truck, I can hear the fuel pump "load up/prime".   So
after doing that five times it started up and I drove half a block to the part
store and then back home, it died twice on the way home, but I made it.
       I replaced the fuel filter, turned the key on and off 5x to "prime" the
engine. And from then on the truck would not start at all! I tried starting it over
and over, waiting a while and then over again.  Nothing.
I took the plastic "vortec" cover off, and  removed, what I think is, some kind
of round sensor attached to the black bar that supplies the fuel injectors.   
The bar was completely filled with gas.  So I am assuming the one on the
other side is the same. I am also assuming the fuel pump is fine since there is
plenty of gas getting here!(???)
I hope that is enough details. It's definitely not spark plugs or start plug
wires,(?) because it does not start at all. And no misfiring when it was running.
Maybe the distributor???
Anyone have an idea of what the problem may be?

Thanks a ton guys!!!