2003 H2 Engine sputtering won't start.

I have a 2003 H2 Lux. Last night the engine started sputtering and it went dead. I had to be towed! I felt like it ran out of gas, but there was gas in it. Anybody got a suggestion?
 
One more thing, I thought about someone putting something in the gas tank, (God, I hope not!) Does anybody know where I get a locking gas cap?
 
Thanks,
 
Bama

did you lose electrical? such as headlights.  altenator could have gone bad and once the battery died.....so did your H2

Busted fuel pump, clogged fuel filter, electrical/faulty ground issue on the alty side or like djguy mentioned, the battery.  Exceptionally clogged up air filter though I'd say that's beyond a long shot ... Fuel injectors but I don't see all of em go kapluee at the same time or get clogged up to that extent ... I'm putting my money on fuel pump/filter or a faulty alty/drained battery ...
 
As far as a locking cap goes, check the forum sponsors, I believe you can get them there.  Where's Jaxtrip when you need him, we need more locking caps bro!!!! LOL!