I have 2011 mega cab diesel Laramie with aftermarket kenwood dnx9140 and viper alarm. I can not inst the minimax for the life of me. H s has sent me three new tuners and did not fix prob. I sent them my PCM and they were able to inst and everything worked great. Untill I tried to put back to stock to take in to dealer. Every time I try to instal or un instal the tuner hangs up at 10% and locks the computer up. I have towed my truck 3 times to dealership. Luckily I have friends at the dodge shop. I think it has something to do with aftermarket audio or alarm. Any help?