I decided to upgrade my unit to the new firmware that is out which required me to take my tune off. The tune I had was modified already for the 4.88 gear option. For whatever reason when I put this tune back in the unit and install in my truck the 4.88 gear option is not there. To make matters worse none of the tunes will save any tire changes I make. It has been years since I had the original modified and don't remember how I went about it. Do I attach a tune here or email someone? Do you want my original backup and one of the diablo tunes?
Thanks for the help. U7193 Predator, 03 silverado 6.0l