**This is an unlock cable only, purchase of a 40420 programmer required**
The Bully Dog GT Diesel tuner unlocks more horsepower and torque to meet the unique demands you put on your vehicle. With shift-on-the-fly tuning for most applications, customizable gauges to track performance, and better control of defueling and regeneration, you'll be able to summon the low-end power to take on tough jobs or improve fuel economy for long highway hauls. Space for up to 10 custom tunes helps you adjust for the many ways you put your diesel to the test.
- 2013-2017 Ram 2500/3500/4500/5500 - 6.7L Cummins