The FISH Tuning Bypass Cable for the Dodge Ram is a must-have for any 18+ Cummins. It allows you to bypass the Security Gateway Module. It works in multiple ways for multiple platforms.
 
If you're using EFI Live, you'll need it to flash a Tune into your 6.7L. Once you install this in your truck, your OBD-II will still function normally and you'll be able to use CSP5 Tunes.