Description
Bully Dog GT Diesel Performance Tuner and Monitor Boosts Power Fuel Economy (40420) unlocks more horsepower and torque to meet the unique demands you put on your vehicle. With shift-on-the-fly tuning, customizable gauges to track performance, and better control of defueling and regeneration, you can tackle tough jobs or improve fuel economy for long highway hauls.
This GT diesel tuner stores up to 10 custom tunes created by your local Bully Dog/SCT Custom Tuning Dealer, helping you adjust for various driving conditions. The GT Diesel delivers dyno-proven tune files that increase horsepower and torque, providing the low-end power needed for demanding tasks.
- Specifications and Dimensions
- Increases horsepower and torque
- Shift-on-the-fly tuning (except Duramax LML and LGH)
- Customizable gauges to track performance
- Stores up to 10 custom tune files
- Monitors a wide range of parameters
- Comes with a mount for on-dash monitoring
- Key Features and Benefits
- Boosts horsepower and torque for better performance
- Improves fuel economy with customizable tuning
- Tracks performance with customizable gauges
- Allows control of defueling and regeneration
- Easy installation with on-dash monitoring
- Stores multiple custom tunes for various conditions






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