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Truck and Jeep Parts Home » Performance Parts » Computer Programmers » Bully Dog Triple Dog GT Diesel Tuner - 40420

Bully Dog Triple Dog GT Diesel Tuner - 40420

Bully Dog | Part Number: B/D40420
Help us ensure this part fits your vehicle Check Fitment
Part Number: B/D40420
  • Technical Details

    • Number of Power Level Settings: 4
    • Select Power Level On The Fly: Yes
    • Top Speed Adjustment: Yes
    • Speedometer Correction: Yes
    • Rev Limiter Adjustment: Yes
    • Internet Updatable: Yes
    • Reads Trouble Codes: Yes
    • Automatic Transmission Adjustment: Yes
    • Approximate Power Gains:Stock, Tow 75 HP, Performance 115 HP, Extreme 160+ HP
    • 2013-2014 Ram 2500/3500 6.7L Diesel requires cable B/D42214 sold separately
    • State Legal: 49 State
    • "In California, this part may not be used upon a highway and may only be used for race purposes

The GT is an all in one downloader, monitor and turning device. The GT features multiple power settings with the ability to adjust drivetrain and user settings. In addition, the GT line features all of the same gauge/monitoring functions as well as the advanced driving coach software aiding drivers in maximizing their fuel economy.

FitmentMonitor IncludedSelectable on the fly
Direct FitIncludedIs Selectable on the fly

Customer Reviews

Average Customer Review

Lots of bang for the buck


By Epic

from Gainesville, Tx


Comments about Bully DogTriple Dog GT Diesel Tuner:

Just purchased this programmer for my 06 duramax, very impressive power gains especially in extreme mode. This is the only programmer I have ever had so I dont know if there is anything better but I can break the tires loose at 45mph on dry pavement in extreme mode so I think thats good enough. I am getting 4 to 6 miles a gallon better than stock. The display shows you everything you need besides


Wonderful Performance


By Cookie man

from South Georgia


Comments about Bully DogTriple Dog GT Diesel Tuner:

It added 3 miles per gallon and added much needed horse power for pulling my camper.


Bully Dog Gt Diesel!


By CumminsFan

from Pocatello, ID


Comments about Bully DogTriple Dog GT Diesel Tuner:

The Bully Dog Diesel Gt Tuner "40420" has by far been my favorite programmer i have had the liberty of using on my truck. I have tried many different brands and the Gt really stands out. Not only did it give me a incredible power increase with 2-4 MPGs better but it also gave me all my necessary gauges needed to keep the truck safe. This tuner is very user friendly. The install could not have bee


a must have


By towboater

from Crosby, Tx


Comments about Bully DogTriple Dog GT Diesel Tuner:

put the triple dog GT on 03 dodge ram 3500 CTD, easy set up, one wire to fuse box! the hardest part was routing wires and trying to decide where i wanted to put it on the window... great power gains, as well as 1-2 mpg(19.9mpg) increase while turning 35s and speeds 70-75. the unit is a little small, about the size of my BB Curve, but not to small where its hard to read... driving coach is nice to


fast install


By big Mike

from Ohio


Comments about Bully DogTriple Dog GT Diesel Tuner:

Great Milage


I rather go with edge programer


By redzombie

from houston tx


Comments about Bully DogTriple Dog GT Diesel Tuner:

The bully dog disel is good for towing and fast acceleration but realy bad on disel. Performance wize is really good you can feel the horsepower as soon as you install ot.

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Questions & Answers

  • Q:

    Are you able to clear engine read and clear engine codes with this unit.
  • Q:

    will this work on a 6 speed manual trans.
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