If the stars align correctly I should have the sensor installed in the car by the end of this weekend. I was under the impression that I needed to have unlimited licenses for a model year in order to write a different tune to my PCM. For example I would need unlimited 2004 GTO and unlimited 2004 C5 in order to write a 2004 C5 file to my 2004 GTO. Would I be able to write a 2005 file to my 2004 PCM?