ok so i got my iTune in the mail and plugged it into my 12 tahoe and tried to upload the diablo tune. i then plugged it in my mac and tried to update it but couldn't figure it out so i ran my windows virtual machine and registered the tuner and updated it. now when i plug it into the vehicle and try ...

updated info file

So what I am gathering from all of this is that you have to plug the iTune into the vehicle let it download the dcm info and then send it to Diablosport and then you will be able to load a tune in the vehicle??? their instructions on how to use this are not very clear.

here is my info file.