GT Diesel Performance Tuner & Monitor

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  • Regular price $499.99
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**Works on many makes/models, please verify below**

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.




  • 2006-2015 Express/Savana - 6.6L Duramax
  • 2006-2010 Topkick/Kodiak - 6.6L Duramax
  • 2001-2015 Silverado/Sierra - 6.6L Duramax



  • 1999-2006 Excursion - 7.3L/6.0L Powerstroke
  • 1999-2010 Super Duty - 7.3L/6.0L/6.4L Powerstroke
  • 2011-2015 Super Duty - 6.7L Powerstroke (Except '13-'15 Cab & Chassis)