Only the industrys leading tuning manufacturer could bring you a product this revolutionary. Combining the best-in-class features of the Heavy Duty WatchDog and Bully Dogs independently SAE tested tuning, the Heavy Duty Gauge Tuner (HDGT) is the premium performance product for drivers and fleet owners. If you are serious about getting peak performance out of your truck while saving money on fuel and repairs, the HDGT is for you. The Tuner: No other product can compete with the superior tuning options of the HDGT. Owners can choose between the Economy tune, the Economy + Power tune or opt for custom tuning. Economy Tune: Tuning for Mileage Gains Subjected to Bully Dogs rigorous on-road beta testing and then confirmed by independent SAE testing, the Economy tune consistently helps drivers achieve mileage gains of 6-12% or more. Economy + Power Tuning: Tuning for Mileage Gains and Additional Power. The Economy + Power Tune safely increases the horsepower and torque of your truck along with proven economy tuning. Users can expect horsepower and torque gains of 18% allowing your truck to perform better while under load, maintaining speed and gaining up to 1 Â½ to 2 gears in the hills. Â Custom Tuning: For drivers who want a little bit more, Bully Dogs professionally trained staff offers complimentary custom tuning. The WatchDog: The HDGT includes Bully Dogs state-of-the-art WatchDog technology which automatically monitors the safety of your engine. Simply set the safety parameters and the WatchDog will alert you if something is wrong that could potentially damage your engine or transmission. The Driving Coach: The Driving Coach helps you achieve your mileage goal by giving you real-time visual and optional audible feedback. Driving Coach Reports can be generated to track your trucks performance. The Mini Mechanic: Waiting for a mechanic to determine why your check engine light is a waste of both time and money. Now you can do it yourself. The Speed Limiter: Drivers going in and out of Canada no longer have to waste time having their speed limiter modified and paying costly change fees or fines. The HDGT allow you to switch the speed limiters yourself saving you time and money every trip. Application Guide Not available for sale in the state of California Click here to read Emissions Notice.