Bully Dog 40420 GT DIESEL Tuner

The GT Diesel tuners unlock 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 offroading all while giving you plenty of power to take on tough jobs or improved fuel economy for long highway hauls.