2000 Chevy 3/4 ton stopped and won't start.

[kcackler]

My friend has a 2000 chevy 3/4 ton with about 130K on it. He was driving to work this morning and it just died on him. No stuttering, just death. He couldn't get it started again. So today while he's working, I'm supposed to be trying to see what's going on.

It turns over strong but just never catches and turns on. He's tight on cash so we're hoping it's something cheap. What should we start looking at first and where should we go from there? I've found lots of info but all it's done is confuse me. In my mind, it seems like we should start with replacing the fuel filter (Never been done on the truck), then the pressure regulator (Though I don't know where it's at on this truck), then the pump, but I don't know enough about his truck to know if it's the right order.

Hoping one of you chevy geniuses can help us out of a tight spot here.

Thanks