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   Bully Dog’s new BDX hand-held performance tuner has a new sleek design with full-color display and customizable gauges thru Marken Performance.  The BDX is the world’s first autonomous tuning device – no PC or USB connections required!  The BDX grabs all the files it needs (even custom tuning files) through an easy-to-use WiFi connection to the internet during the install process. 
   Cloud-based tune delivery over built-in WiFi means that the BDX will always be running the latest tuning- enabling drivers to stay one step ahead of the pack. 
   The BDX includes data logging and the ability to read and clear check engine light codes. 
   Custom tuning from Bully Dog dealer Marken Performance can send custom tunes direct to your device over the cloud using the in built-in WiFi as the BDX holds up to 10 tunes. 
   The BDX kit comes with USB cable and OBD 2 cable. 
      Video BDX  



   With the Bully Dog 40420 GT Platinum Diesel tuner get the true potential of your 2013+ – 6.7L Cummins (unlock cable required), 6.6L Duramax and 6.7L Powerstroke. This part is in stock @ Marken Performance.

2015 Cummins 6.7L tunes:

  • Stock: No Horsepower / Torque Gain
  • Tow Gains: +26 HP / +8 lbs Torque
  • Performance Gains: +55 HP / +96 ft-lbs Torque
  • Extreme Gains: +97 HP / +185 ft-lbs Torque

2015 Duramax 6.6L LML tunes:

  • Stock: No Horsepower / Torque Gain
  • Tow Gains: +31 HP / +59 ft-lbs Torque
  • Performance Gains: +50HP / +91 ft-lbs Torque

2015 Power Stroke 6.7L tunes:

  • Stock: No Horsepower / Torque Gain
  • Tow Gains: +20 HP / +50 ft-lbs Torque
  • Performance Gains: +48 HP / +92 ft-lbs Torque
  • Extreme Gains: +71 HP / +145 ft-lbs Torque 

    The Bully Dog GT Platinum Diesel 2015 applications offer all of the same benefits you have grown to love – switch-on-the-fly power adjustments, download functions, tune safety protection (defueling), monitoring via virtual gauges and more!


   Bully Dog GT Platinum Tuner part # 40417 is our newest all-in-one gas application! Over 700 different applications and 11 different Vehicle Manufacturers makes the GT Platinum the most versatile tuner in the Marketplace to date available! To see if your vehicle is eligible, contact Marken Performance.  

   The GT Platinum is 4 products in one; a vehicle engine tuner, monitor, gauge and diagnostic device all in a single unit. The GT dramatically improves the utility of your vehicle by increasing horsepower, improving fuel economy and providing a comprehensive set of monitoring features and diagnostic functions. This product is incomparable to other tuning products because it has the largest feature set and the widest range of vehicle applications from a single product part number. Track your performance using the data logging features of your GT and the Performance Testing Software for your PC.  

   With the Watch Dog, GT, or PMT you can run your own diagnostics check to find out what that check engine light means and then you can erase them yourself.  

   Bully Dog GT Tuner offers space for 10 custom tunes, so you can dial in performance as needed. Depending on the vehicle and it’s options, you can control everything from auto door locks to disabling the traction control can be managed through the controller. You want a setting to control how long an accessory will remain on after the engine has been turned off and the doors closed? Bully Dog has you covered. Maybe you just want to run the high beams and fog lights at the same time? No problem. Maybe you just don’t like the key reminder buzzer on your truck. The Bully Dog GT tuner will allow you to change the frequency of the buzzer. 

    Here is a list of the potential features that can be adjusted by the Bully Dog GT Gas Tuner: 

Accessory Delay: Control how long the accessory items will remain on after the engine has been turned off and the doors remain closed. Accessory items such as the radio, cigarette lighter, ect.

Active Fuel Management (AFM): Used to enable or disable the AFM (Active Fuel Management) V8 <> V4 functionality.This will only function if the engine is mechanically equipped to shut off cylinders.

Adjust Timing: Adjust the timing of your engine from +4 to -8 to increase power or fuel economy according to your vehicle’s specifications.

Auto Door Lock: Enable the vehicle to automatically lock all the doors any time it reaches a speed of 15mph. Once the vehicle comes to a stop, if the driver’s door is the first to open, then all other doors will automatically unlock.

Axle Lockers (2WD and 4WD-Hi): Easily engage the wheel lockers for off-road traction. (Rubicon Only off road)

Axle Ratio: Correct the vehicle speedometer (and fuel efficiency calculations) if you have changed the gear ratio on your vehicle.

Boost Control: Used to enable or disable the use of a specialized data table for turbo/supercharged engines.

Brake Torque Management (BTM): This will disable the BTM (Brake Torque Management) from functioning when the traction control system is switched off.

CAM Variation Relearn: Used to relearn if vehicle has been flashed and/or if CAM position sensor has been changed. Would have to be done at the dealer but now can be done through the GT.

Coolant Temperature: Current coolant temperature; this information is used for warning level and safety defueling settings.

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.

Daytime Running Lights: Disable or enable daytime running lights.

Disable Traction Control: Disable the traction control.

Engine Fan: Enable and disable the engine fan regardless of coolant temperature.

Fog Light/High Beam: Be able to use the fog lights and the high beams at the same time.

Fuel Dynamics Compensation (FDC): Used to enable or disable the FDC (Fuel Dynamics Compensation) algorithms.

Head Light Delay: Set the amount of time that the head lamps remain on after the engine has been turned off.

Headlight Approach Timer: Adjust the length of time the lights remain on when a vehicle unlocking the vehicle with the remote.

Horn Chirp Length: Adjust the length of the horn chirp to either short or long when the vehicle is locked using the remote.

Horn Chirp On Lock: The vehicle horn will sound each time the doors are locked by a remote while this feature is enabled.

Idle Adjust: Enable and select a value for Engine Idle position.

Idle Learn Reset: Vehicle relearns idle parameters depending on the current environmental variables.

Multiple Displacement System (MDS): Enabling the MDS initiates a fuel saving 4-cylinder engine mode and disables additional engine cylinders.

Optical Flash On Lock: The hazard lights will flash each time the doors are locked using the remote when this feature is enabled.

Pyrometer Temperature Warning: This gauge option shows the pyrometer temperature in °F or °C. This information is used in warning settings to alarm when the pyrometer temperature limit is exceeded.

Relearn Vehicle Data/Transmission Adaptive Learning: The transmission adaptive learning, (TAL), changes the way the automatic transmission in the vehicle shifts based on driving habits.

Reset Engine Oil Life: Reset the vehicles’s engine life indicator manually through the GT instead of cycling through all the dash options.

Reset Transmission Oil Life: Reset the transmission oil life manually through the GT. This would have to originally be done by the dealer but now can be done on demand.

Rev Limiter: Regulate the highest RPM that an engine can reach before the engine is electronically limited. Increasing the RPM limit is recommended only for racing purposes.

Seat Belt Chime: Turn off seat belt reminder chime.

Smart Unlock Configuration: Change the way you unlock your vehicle when using a remote. Unlock only the driver door with the first button press and unlock the passenger doors by pressing the button again, or unlock all the doors at once.

Speed Limiter: Change the top speed that the vehicle will reach before the engine automatically limits the power needed to go faster.

Switch A/F Sensor Reading: Switch between O2 sensors for correct Air/Fuel Ratio values.

Throttle Sensitivity: Adjust the throttle sensitivity for stock, fuel saver, performance and extreme modes.

Tire Size: Correct the speedometer if you have changed your tire size from stock.

TPMS: Change or disable the Tire Pressure Monitoring System.

Transfer Case Ratio: This function is for users who have physically replaced the Transfer Case. It is only necessary to adjust this when swapping out the Transfer Case for a different Case with a different low range ratio.

Transmission Shift Firmness: Change the shift firmness of an automatic transmission.

Transmission Shift Points: Change the RPMs at which an automatic transmission will change gears.

Transmission Temperature Warning: This gauge option shows the transmission temperature. This information is used in warning settings to alarm when the transmission temperature limit is exceeded in automatic transmissions.

Unlock Driver Door: Disable this feature so all of the vehicle doors will unlock with one press of the button on the remote.

Wide Open Throttle Disable (WOT): Remove the throttle position governor and use up to 100% of your vehicle throttle before you reach 40 mph.

                  VIDEO GT Platinum 40417  

    More Bully Dog Tuners:


This Triple Dog Gauge Tuner or GT from Bully Dog is 4 products in one;  a vehicle engine tuner, monitor, gauge and diagnostic device all in a single unit from your Bully Dog Canadian & USA dealer Marken Performance.   For Gas Engines choose between regular and premium tuning for an increase of 10 to 30 horsepower (depending on application) and up to 49 lbs.ft. of torque to the rear wheels (more for Diesel).  Couple the added power with our shift point mods,  rev limiting mods and other download features like the ones  specially made just for Jeepers which include the ability to disable the electronic sway bar up to 30 mph (stock limits this to 18 mph) which gives you the freedom to drive how you want.  You can also adjust the tire pressure monitoring (or disable it completely) to allow for hassle-free airdowns.  This product is incomparable to other tuning products because it has the largest feature set and the widest range of vehicle applications from a single product part number.  

Part # 40410 for GAS. For: Nissan, Infinity, GMC, Ford, Chevy & Cadillac. Now also available for the new 2014 Silverados and Sierras with 5.3L, 6.0L and 6.2L gas engines adding up to 19 HP to your Chevrolet® or GMC® truck, allowing multiple drive train settings to be tuned and adjusted, includes a fully customizable gauge pack that monitors four gauge functions at one time and not least of all, contains a Driving Coach feature that will help train efficient driving habits.! 


   GT JEEP # 40440 Video


Bully Dog's GT for Hemi now works on the 2011-2012 Dodge Ram! Yes, after months of going without, Hemi owners can now have access to adjust their speed limiter, tire size, shift points and more. Monitor it all with gauges for everything you want to watch: trans temp, engine load, fuel economy – the GT will watch it all. # 40430

 Features include: 
Sound Horn On Lock
Flash Hazards Lamps On Lock
Auto Door Lock
Auto Door Unlock
Tire Pressure Monitoring System (Disable) or Update Pressure Thresholds (28 psi to 80 psi)
Illuminated Entry Time: 0-254 seconds
Headlamp Delay Time :0-254 seconds
Accesory Delay Time: 0 - 65534 secs
Horn Chirp Duration: Short or Long
Daytime Running Lamps
Door Alert Enable
Unlock All Doors First Press
Disable Display of Clock Radio
Seatbelt Alert Minder

HD GT Tuner 46500 For Heavy Duty Diesel Tuning, save $500 a month on fuel on your 18 wheeler. For a limited time 60 day free trial see this video: ClickMe .  Not only does it tune, it also acts as 4 gauges.  Part # 46500.  To see installation video: ClickHere 
No other product can compete with the superior tuning options of the HDGT. Owners can choose between the standard equipped Economy Tune, the Economy + Power Tune or opt for complete custom tuning by one of Bully Dog's trained professionals.
Subjected to Bully Dog's rigorous on-road beta testing and independent SAE testing, the Economy Tune consistently helps drivers achieve mileage gains from 6 to 12% or more.
The Economy + Power Tune improves fuel economy while safely increasing the horsepower and torque of your truck. Dyno tests show performance increases up to 18% while drivers report being able to and save time and money by being able to pull heavier loads without downshifting.
For drivers who want to push the parameters and standard settings of engine tuning even further, Bully Dog's professionally-trained tuners o­er complimentary custom tuning. If you need even more power, more pull, and more miles out of every gallon, call our Heavy Duty Technical Support line at 940-783-9914


   Now available thru Marken Performance is this great GT Armor by Bullydog.  The GT Armor product line is made from durable silicone with UV protection to deliver an extra layer of protection to your Gauge Tuner from Bully Dog. Make your choice between multiple skins and find the Armor that suits your taste in style while protecting your GT unit from moisture and small impacts. 
   Colors, styles available with part numbers:  Desert Camo (30700), Snow Camo (30701), Red (30702), Green (30703), Yellow (30704), Blue (30705), Black (30706), White (30707). 

Rapid Power Module The Rapid Power module for small DIESELS improves fuel economy by improving the efficiency of the fuel that is used, therefore the rapid power module allows the vehicle to produce the same power as stock using less fuel.  The Rapid Power Module is a plug-in performance module, designed to improve the power and performance output by improving the efficiency of the vehicles fuel injection system. The result is, of course, more horsepower. Some of the applications can see 25 more horsepower and 30 lbs ft. of torque through the entire power band while reaching peaks of 35hp and 40 lbs. ft. Torque.  Unlike some of our other products these modules do not tune the engines for a huge gain in peak to peak horsepower but rather focus on where the power really counts.  In turn these modules increase power output more through the lower-mid to upper-mid level RPM range. The peak to peak horsepower is also increased but just not as dramatically as the rest of the power band.

Practical uses for the Dodge and Freightliner SPRINTER, Jeep Grand Cherokee 08-09, Mercedes GL320 & E320, Jetta 09-10


 Part #  Vehicle  Engine  Years  H.P.   Torque
 44631  Mercedes  2.7ltr - 3.2ltr  01 - 06  + 35  + 40
 44632  Mercedes  3.0 ltr V6  07 - 10  + 35  + 40
 44633  Volkswagon  2.0 ltr TDi  09 - 10  + 25  + 30


 The Bully Dog new GT T+ (part # 40450 from Marken Performance) can tune your Toyota's 4.0 ltr or 5.7 ltr vehicle. Features include: HP/TQ Tuning, Monitoring & Data Logging, Tons Of Special Features, DTC Read and Erase.  Call to reserve yours today. 

ClickMe to watch a Video where Bully Dog tune a 2012 Toyota Tundra with factory TRD Supercharger and gain +71 Hp, +70 TQ.





  4.0L 2010-2012


  5.7L 2008-2013

  5.7L FLEX FUEL 2010-2013


  4.0L 2009-2011

  4.0L SUPERCHARGED 2009-2013


  5.7L 2007-2013

  5.7L FLEX FUEL 2010-2013

      Tuning Options

Stock:  This tune allows the user to download special features and functions. 

Tow:  This will give our drivers a higher average horsepower over what they had before as well as a powerful torque improvement that pulls their engine performance to an improved level with an additional 7 horsepower. 

Regular:  This will help your engine to show its true power using its inherent but hidden horsepower and torque! Enjoy an additional 9 horsepower! 

Premium:  This will give your engine the maximum level of power and torque available! You can enjoy up to 25 horsepower in gains and 30 ft/lb torque depending on application. 

     Tuning Features

Speed Limiter:  This option allows drivers to set limits that will keep their vehicle under a certain speed or remove the speed limiter. 

Shift Points (Auto Transmission):  Change the RPM level at which your automatic transmission will shift gears when the throttle is wide open. 

Driving Coach:  The Driving Coach is invaluable for teaching great efficient driving habits. Using momentum and minimizing your acceleration and braking will help your engine access the full mileage available in every gallon of gas that you put in your tank. The Driving Coach uses an efficiency bar to display when you are using your momentum correctly and using a grading system, will develop habits that will benefit your fuel economy. You have the option to use an alert system for when your driving becomes inefficient but of course you can choose to turn off these alerts in the GT T + menu. 

Display:  The GT display is the key to a successful tune. With over fifteen vehicle parameters that can be monitored and displayed, you can watch your engines performance and keep tabs on all the measurements you care about. With one screen displaying 4 gauges at one time, and easy navigation, you will see the difference our tuner can make for your engine from a second to second basis. Multiple display options let you change between gauges and a full color display let you customize your screen to your preference. 

Day and Night Mode:  This feature offers two modes for your GT T+ display. If switching between day and night modes doesn't happen automatically, simply push the bottom button just to the right of the display screen and your background will go turn black, which dims your GT for minimal distraction for night time driving. Pushing the top button to the right of the display screen will make your display go back to a brighter daytime mode. 

DTC's:  Codes used by vehicle manufacturers to identify problems; this information is gathered by the engine computer and accessible through the vehicle's diagnostic port (OBDII). 

Data Logging:  Want to record what your engine performance is doing over a period of time? Use the data logging feature to download results from a drive logged for later use. If you want to record engine performance over a period of time, use this feature. 

Performance Testing:  Someday, you may get the chance to drive where there are no posted speeds. Take your Bully Dog GT T+ with you, because it's a racing man's best friend. Our GT T+ can give drivers a quarter-mile time and a 0-60 time so you can post a personal best. It comes with a drag tree on display so you can really feel what it's like to unleash your engine. 

      Safety Warnings

Pyro Warning:  Your pyro warning will sound when your pyro temperatures become too hot. This can be set up in your GT T+ menu. 

Coolant Temperature:  If your car begins to overheat, you will be the first to know with the use of this warning. This will notify when your coolant temperatures are getting too hot. This is customizable in the GT T+ menu. 

Transmission Temperature:  This gauge option shows the transmission temperature. 

       Special Features

  Display and Lighting

Display Ex Off:  This changes the brightness when canceling the lights for the indicator light of the combination meter, A/C indicator light and clock. 

Display Ex On:  This changes the brightness when dimming the indicator light of the combination meter, A/C indicator light and clock. 

Foot Light:  This sets the time the Outer Foot Light is on. 

Interior Lighting:  This will turn the interior light on when the ignition switch is turned from "ACC" to "LOCK". This will also turn on the interior light, ignition light and step light on when the door is unlocked by the door key cylinder. 

Light Sensitivity:  This adjusts the sensitivity of the lights 

Light Auto OFF:  This will light the headlight for a time after the doors are closed with the ignition switch turned ON and the light control switch is at HEAD or AUTO and the headlight is ON. 

Light Time On:  This function changes the time between when the doors are closed and the lights go off when the light control switch is at HEAD or AUTO, and the headlight is on. 

   Door Lock Functions

Auto Lock:  Doors on the vehicle lock automatically after the vehicle reaches a certain speed. 

Auto Lock on Shift:  This locks the door when the lever shifts out of the P range. 

Auto Unlock on Shift:  This unlocks the door when the lever is shifted into the P range with the ignition ON. 

Unlock All Doors on Shift:  This unlocks every door but the driver door when the driver door is opened after the ignition is switched off after a certain time. 

   Key Cylinder Functions

Power Windows:  This makes the driver window (and all windows, depending on vehicle grade) and sunroof close if the driver window control is held closed. If the driver door window control is held open, the driver's door window (and all the windows, depending on vehicle grade) and the sunroof will open. 

2 Turns Open All Doors:  This unlocks only the driver door when the key UNLOCK button is pushed twice. When this setting is switched OFF, the key UNLOCK button will unlock all the doors. 

Sunroof Operation:  This will open the sliding roof if the door switch is held to UNLOCK and the ignition switch is OFF. This will also close the sliding roof if the door switch is held to LOCK and the ignition switch is OFF. 

Sunroof Action:  This selects the opening direction of the sliding roof when holding the driver side door key unlocked for a certain time when the ignition switch is OFF. 

    Key Fob Functions

Wireless Control:  This is used to turn the wireless door lock ON or OFF. 

Horn Chirp on Lock:  This turns the wireless buzzer response function ON or OFF. 

Open Door Warning:  If a door is open when vehicle is being locked by the wireless door lock, a buzzer will sound. 

Panic Function:  The "ON" setting will enable the Theft Deterrent System by pressing and holding the Panic Button. Use the Lock Button if the Panic Button is unavailable. 

Wireless Auto Lock:  This automatically locks doors after they are unlocked with the wireless key. 

Auto Lock Time:  This will change the amount of time from unlocking the door(s) with the wireless key to re-locking them automatically. 

Optical Flash on Lock:  This is used to turn ON or OFF the hazard answer back of the wireless door lock. 

Unlock Driver Door:  Use the GT to disable this feature so all of your vehicle doors will unlock with one press of the button on a remote door lock unit. 

   Power Back Door

Wireless PBD Operation:  This function changes the operation of the PBD by transmitter. 

PBD Buzzer:  This function will adjust the volume of the buzzer while the PBD operates. 


Entry Delay:  This will change the Entry Delay Time, or the period before starting the warning, by the Passive Mode. 

Passive Mode:  This will set the Theft Deterrent System in 30 seconds after the Driver door is closed and the Key is removed from the Ignition Key Cylinder. 

Warning Broken Glass:  This will turn the Glass Break Sensor ON or OFF. 

Warn by Horn:  This turns the glass break sensor ON or OFF. It is only functional when the vehicle has a glass break sensor. 


Key Reminder Sound:  This function changes the times at which the key reminder buzzer will continue to sound. 

Key Reminder Volume:  This changes the volume of the key reminder buzzer. 

Seat Belt Chime:  This changes the seat belt reminder chime. 



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