So with this PCM reflash, do you think I need it on my 2004? It could of been make before Dec 2003. And with a PCM reflash, does that reflash your ECU or something else? Because I had powerchip reflash my ECU, so I don't want it to go back stock. Thanks.

P.S. If I do need to flash the PCM, would the dealer give me crap or can I go somewhere else for it?