Ok new to hp tuners just getting started hope I'm not beating a dead horse.Trying to turn off Dod on wife's Tahoe.Had trouble reading it at first because it was wanting to read.ecm and 2 other modules I believe one was tcm.So after messing with it and telling it to not read those other modules I was able to read and save the tune.Now before I write the calibration back I want to know if because I couldn't read those modules will I have an issue with the transmission or something by just doing a write calibration?Or will it just make the changes to the ecm and leave the other modules alone?Any insite would be great just trying to not screw something up.Thanks.