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GT Diesel Performance Tuner & Monitor

Bully Dog

$469.00
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The Bully Dog GT Diesel tuner and diesel monitor unlocks more horsepower & torque to meet the unique demands you put on your vehicle. With preloaded tuning you can plug ‘n play. The built in “Driving Coach” feature helps improve driving habits for better fuel mileage. Customizable gauges track performance, and a wide variety of hauling and off-roading, all while giving you plenty of power to take on tough jobs or improved fuel economy for long highway hauls.

Enhance your vehicle’s performance with the Bully Dog 40420 GT Diesel Tuner & Monitor. Unlock more horsepower and torque for better fuel efficiency.

The following vehicles require the 42215 bypass cable to properly tune with the GT diesel tuner. The 40420 comes with a mount. Cable sold separately.

2018 RAM 2500-5500 6.7L Cummins
2019 RAM 2500-5500 6.7L Cummins
2020 RAM 2500-5500 6.7L Cummins
2021 RAM 2500-5500 6.7L Cummins

Bully Dog tuning devices will not modify or delete vehicle emissions. Bully Dog products purchased comply with the Clean Air Act. Tunes that are preloaded in our devices have gone through hours of testing to ensure the safety of the drivers and the environment overall. Custom tuners are required to follow the guidelines of the Clean Air Act as they develop their own tunes for our devices.