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USD 799
Part #: BT46502

Bully Dog 46502 Medium Duty Gauge Tuner

2008-2016 Cummins ISB, ISC, ISL | Paccar PX-6, PX-7, PX-8 ,PX-9
Part #: BT46502
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The Bully Dog 46502 Medium Duty Gauge Tuner is inspired by the popular Heavy Duty GT Tuner. The sleek, intuitive Medium Duty GT Tuner increase horsepower, torque and fuel efficiency for tow trucks, tool trucks, and medium-duty applications. A push-button interface, on-screen virtual gauges, and immersive full-color display help you clear DTC Codes, monitor data, and adjust performance with dyno-proven calibrations. The Driving Coach and Speed Limiter features enable efficient and safe driving. 

Advanced Tuning Technology
Preloaded with 3 levels of emissions-tested, dyno-proven tune files to satisfy your unique demands. As your performance needs change, simply choose between loading Economy, Economy+Power, or Power Tunes. The perfect combination of horsepower, torque, and efficiency right at your fingertips. 

Safety Features
Have more confidence while hauling. Set vehicle warnings to alarm if parameters are exceeded for coolant temperature, oil temperature, boost and speed.

Fuel Savings
Start saving today with the Bully Dog Heavy Duty Gauge Tuner with fuel savings up to 12% and keep the truck running longer safer. Utilize the driving coach to get the best economy possible.

Monitor Parameters, Read & Clear DTC's
Monitor many parameters to keep track of your engine performance. Read and clear diagnostic trouble codes, so there's never any question about an issue before heading to the shop. 

  • Proven Performance 
  • Built-In Safety Features 
  • Digital Monitoring To Ensure Engine Functionality
Adjustable Parameters:
  • Speed Limiter - Change the top speed that the vehicle will reach before the engine automatically limits the power needed to go faster.
  • Boost Warning - This gauge option shows the boost. This information is used in warning settings to alarm when the boost limit is exceeded.
  • Cruise Limiter - Increase and decrease the set limit of the vehicles cruise control. Very useful if continually crossing the US-Canadian boarder to change the cruise control set limit.
  • Oil Temperature Warning - This gauge option shows the engine oil temperature in °F or °C. This information is used in warning settings to alarm when the oil temperature limit is exceeded.
  • Coolant Temperature Warning - This gauge option shows the coolant temperature in °F or °C. This information is used in warning settings to alarm when the coolant temperature limit is exceeded.

2007-2010 8.3L Cummins ISC 
2010-2016 8.3L Cummins ISC 8.3 
2007-2010 8.9L Cummins ISL 
2010-2020 8.9L Cummins ISL 9
2007-2020 6.7L Cummins ISB

2007-2016 6.7L Paccar PX-6
2007-2016 6.7L Paccar PX-7
2008-2012 8.3L Paccar PX-8
2013-2016 8.9L Paccar PX-9


  • MFG. Number 46502
  • Manufacturer Name Bully Dog Heavy Duty
  • Shipping Weight 5.00 lb.
  • Shipping Length 11 in.
  • Shipping Width 4 in.
  • Shipping Height 14 in.
  • Fuel Type Diesel
  • UPC 681018465021
  • Prop 65 WARNING: Cancer & Reproductive Harm -


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Questions and Answers

Will this tuner work on Diesel pusher RV’s with the applicable engine?
View Staff Answer 
The BULLY DOG 46502 MEDIUM DUTY GAUGE TUNER fits the following engines in RV’s & other medium duty applications. -2008-2016 Cummins ISB, ISC, and ISL with 2250 or 2350 ECM & Paccar PX-6, PX-7, PX-8, and PX-9 engines

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Emissions Notice

This product is not legal for sale or street use in California. Certain aftermarket products are subject to governmental emission standards regulated by the California Air Resources Board. In order for these products to be legal on a specific vehicle in California, the part number must receive a CARB Executive Order (EO) number. This number makes the part legal for use only on specific years, makes and models of vehicles. A decal with CARB EO number for these parts must be displayed in the engine bay to satisfy smog inspection requirements.