Overview
Unlock the potential of your 2018-2021Cummins with the Bully Dog 2018-2021 Cummins bypass cable for use with the Bully Dog GT Diesel and H&S Mini Maxx.
A 5 simple step process is all that is needed to download tuning and special features to your truck.
- Purchase a GT Diesel or Mini Maxx and the Cummins Unlock Cable part #42215.
- Install the GT Diesel or Mini Maxx and follow on-screen instructions.
- Install the Unlock Cable and follow on-screen instructions on the GT or MM.
- Install Tuning from the GT Diesel.
- Leave the unlock cable installed and hooked up to the GT Diesel or MM at all times.