The question I have, and I get conflicting answers, is what happens if you are tuned. The dealer has to flash the PCM. When they flash the PCM I assume that will create a new stock tune, however, I could be wrong, maybe the flash does not touch the tune. I called Calibrated to ask if I need to send them the new stock tune for updated their tunes. I called four times because of their uncertainty, I received 3 no answers and one yes answer.
Does anyone have any insight to what might be required after the Y78 flash and tunes?
I'm also posting this on Cummins Forum