Thanks Red, I was just under the impression it was plug and play. I assume if I get a 411 PCM from a 01-02 5.3 (Vin T) It would work- run? I do plan on getting a tune but cash is limited so im kinda piecing it together for now. I really have no idea but I am assuming it wont start because the PCM I bought is a 411 but is flashed for a 4.3?