Morning guys, wondered if any of you could enlighten me to these tuners. The used Challenger I purchased has a Diablo tune in it - the car was also taken to High Horse Performance for a tune. The previous owner unlocked the PCM on the car. Here's my question, when taking this car for service to the dealer what will happen to the tune and the car?? Meaning will I lose the tune if they flash the PCM and will the car start running like crap? He did a lot of mods to this car and I'm not sure how all that will be affected. Does anyone have any advice or know how this works? Really appreciate the benefit of some of your wisdom to help. Thanks. By the way, he left the tuner in the back seat of the car - I don't think its still there and he thinks the dealership might have taken it out. So I don't have the original tuner.