Just bought a used xcal2. Which download do I want to get off of their website. Do they have tunes to download? This tuner had a tune in it but it was for a 02' not an 01' like mine. So I won't be able to use it correct? It says wrong vehicle. The previous owner says he put it back to stock. Is it because the pcm number is different between the years or was it not put back to stock?