The GT Gas and Diesel tuners unlock more horsepower and torque to meet the unique demands you put on your vehicle. With preloaded tuning, customizable gauges to track performance, and a wide variety of hauling and off-roading features, you'll have plenty of power to take on tough jobs or improved fuel economy for long highway hauls. Product Features:Track critical performance data in real-time on easy to navigate virtual gaugesSelect between multiple street-tested, dyno-proven tunes for economy, towing or performance.Reads and clears DTC (Diagnostic Trouble Codes) with easeManage tire size, gear ratio, speed limiter, speedometer calibrations, shift points, and more. Offering shift-on-the-fly tuning and better control of defueling and regeneration.Product might not be available in all states due to local laws.