no voltage at injector plug when doing a lead test

all of them or just one?

all of them but truck runs but 5+6 dont fire replaced injectors 5+6 sill the same thanks

ok there is a couple of thing I want to mention, I think the crank position or cam sensor may b be the culprit, however I think you should follow the wiring underneath the manifold to see if they are rotted,before you pay for anything, then there is always the pcm being faulty