WTS Light? - do you get it when you first roll-on the key?
Tach Movement? - does the tach needle move up slightly when cranking? (on an '01 it SHOULD move if you don't have a factory Trans Temp Gauge, and Won't if you do)
Fuel - pump runs? Fuel refilling filter housing? Tank below 1/4?
Is your truck "chipped"? If so, maybe remove it as a Test.