I'm not sure if this is the correct section to post this question in but, it seems logical....So, I am working with my 2000 GMC Sierra P01 ECM.. I currently have a canned tune from a DiabloSport tuner known as the "93 tune". I recently have purchased the MPVI3 and have been working with learning the software and making some changes to my tune. I have not added any credits or attempted to "write" anything back to the truck. My question is this, will I have any issues with the DiabloSport tune when I attempt to write anything back to the truck? I've been going through and comparing the differences between a stock 2000 truck tune from the repository and the tune that I pulled from my truck and I am finding some places where it seems there should be numbers input but, it's zero'd out. For instance, in my read tune (DiabloSport 93 tune) the idle numbers in P/N and AC on/off are all zero'd out. I'm wondering if for some reason when I read the tune with HP the DiabloSport tune is ommiting numbers or something?