The GT Diesel tuner unlocks more horsepower and torque to meet the unique demands you put on your vehicle. With shift-on-the-fly tuning*, customizable gauges to track performance, and better control of defueling and regeneration, you’ll be able to summon the low-end power to take on tough jobs or improve fuel economy for long highway hauls. Space for up to 10 custom tunes helps you adjust for the many ways you put your diesel to the test. 

*Duramax LML and LGH are not shift on the fly.
* This product is not legal for sale or use in California on pollution controlled motor vehicles


FEATURES

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

Daytime Running Light
Disable or enable daytime running lights.

Fog Light/High Beam
Run the fog lights and the high beams at the same time.

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

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

Initiate DPF Burn-off
This feature will send a request to the engine computer to start the desoot process of the diesel particulate filter (DPF). NOTICE! The DPF Burn-Off should only be used if absolutely necessary. If the diesel particulate filter clogs often on a particular vehicle, there may be an issue with the filter itself which would need to be serviced by an OEM dealer.

Mobile Desoot
Diesel Particulate Filter Burn-Off enable.

Optical Flash on Lock
The hazard lights will flash each time the doors are locked by a remote control unit when this feature is enabled.

Pyro 1
A pyrometer (pyro) measures exhaust gas temperatures (EGTs); which can be used for defuel and warning level settings to help protect the engine from heat damage.

Pyro 2
A pyrometer (pyro) measures exhaust gas temperatures (EGTs); which can be used for defuel and warning level settings to help protect the engine from heat damage.

Seat Belt Chime
Turn off the seat belt reminder chime.

Shift on Fly
Change tuning level while driving.

Transmission Adaptive Learning

Hold, resume and reset transmission adaptive learning (TAL), which changes the way the automatic transmission in the vehicle shifts based on driving habits. To pause or stop the TAL process, choose hold. To continue a paused TAL process, choose resume. To restart and relearn driving habits, choose reset. 

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.

 

WHAT YOU CAN ADJUST

Adjustable Options vary for each vehicle and are not available on all vehicles

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, etc.

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.

Boost
This gauge option shows the boost. This information is used in defuel settings to reduce the boost when the limit is exceeded.

Boost Warning
This gauge option shows the boost. This information is used in warning settings to alarm when the boost limit is exceeded.

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
Dissable or enable daytime running lights.

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

Idle Adjust
Enable and select a value for Engine Idle position. This is a great feature for keeping voltage in the vehicle up while running auxiliary electronics off of the vehicle’s power system.

Idle Shutdown Timer
Set the length of time the vehicle will idle until the engine turns off. Great feature to save fuel to stop continous idling and extend the life of the turbo by allowing it to cool down before the engine shuts off.

Low End Power
Increased throttle sensitivity across the full RPM range.

Mobile Regeneration

Lower soot accumulation in the DPF by manually starting a regeneration at highway speeds.

Oil Temperature
This gauge option shows the engine oil temperature in °F or °C. This information is used for warning level and safety defueling settings.

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

PTO
Adjust the RPM of the PTO from the unit manually.

Pyrometer
This gauge option shows the pyrometer temperature. This information is used in defuel settings to reduce the exhaust temperature when the limit is exceeded.

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.

Seat Belt Chime
Turn off seat belt reminder chime.

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

Stationary Regeneration
Lower soot accumulation in the DPF by manually starting a regeneration while parked.

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

TPMS
Change or disable the Tire Pressure Monitoring System.

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

Transmission Temperature
This gauge option shows the transmission temperature. This information is used in defuel settings to help prevent heat damage to the transmission. (This gauge option is not available on all vehicles.)

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.

About us

WHO WE ARE

Bully Dog began in American Falls, Idaho in 1998 as an enthusiast business focused on improving diesel engine performance. Since then, the brand has come to stand for leading-edge engine ECU calibration, high-quality aftermarket parts, and precision data-logging & monitoring technology. With a talented and well-rounded team of designers, engineers, quality control professionals, salespeople, and customer support staff, Bully Dog continues to produce innovative technologies that make use of advances in mobile computing, Wi-Fi & Bluetooth communication, cloud computing, and performance monitoring to deliver unparalleled performance. As a result of its recent merger under Derive Systems, Bully Dog, Bully Dog Big Rig, SCT, and Derive Efficiency brands have integrated into a world-class operation and a dominant force in the automotive technology space.

WHAT WE DO

Bully Dog is at the forefront of performance ECU calibration technology for gas and diesel vehicles looking to add performance, tackle tough terrain, haul heavy payloads or tow trailers over long distances. Our calibration software platform adjusts key performance parameters to better respond to the unique demands you put on your vehicle, whether it’s adjusting for tire size, axle lockers, throttle sensitivity or shift firmness. Easy installation using one of our advanced handheld programmers means quick, out-of-the-box access to better performance, added safety and improved fuel economy. Bully Dog also offers a precision-engineered, top-quality line of performance intakes, diesel particulate filters, manifolds and turbochargers to help vehicles run stronger and last longer.

Returns

Returns/Repairs of Merchandise. You must notify Derive of your desire to return defective merchandise within the applicable warranty period, and you must return the defective merchandise to Derive within two (2) weeks of such notice. Items must be returned in the original manufacturer's packaging. We strongly recommend you inspect your merchandise promptly upon receipt, and keep your packaging until you are satisfied that the merchandise is not defective. Once your return request is processed, and is verified to meet the basic criteria below and verified to be defective and covered by Derive’s Limited Warranty for such merchandise, your replacement merchandise will be sent to you in a reasonable period of time, depending on replacement merchandise availability.

You are responsible for shipping costs for merchandise returned during and after the applicable warranty period, except in the following instances: (1) If Derive’s Technical Support Department is contacted within the applicable warranty period and subsequently issues you an RMA for a defective product, you are responsible for the shipping costs for returning the merchandise to Derive’s Technical Support Department and, once the item is repaired or replaced, Derive will be responsible for the shipping costs for shipping the merchandise to you in the same freight manner (Ground, Next Day, etc.); (2) If Derive’s Technical Support  Department is contacted within the applicable warranty period and subsequently verifies that your merchandise was defective or damaged when initially shipped by Derive and covered by Derive’s Limited Warranty for such merchandise, or that there was an error on Derive’s part related to your Order, then Derive will be responsible for the ground shipping costs for your return of such merchandise to Derive, and the ground shipping of the repaired/replacement merchandise to you. For any returns after the end of thee applicable warranty period, you will be responsible for all shipping costs.

The risk of loss for the merchandise being returned to Derive shall be with you at all times

during the shipment of such merchandise. Title to the merchandise being returned will remain with you at all times and transfer from you to Derive, only upon receipt of the merchandise by Derive.

Returns must be received in good, unused condition in order to be accepted. If items are not received in re-salable condition, they may not be accepted or refunded. Unless due to an error on our part or if the merchandise was defective when shipped by us, the return and refund will be subject to a 25% re-stocking fee to cover the costs of packaging, labor, and

credit/debit card fees we have incurred.

Incorrect or defective merchandise cannot be returned without following all of the procedures set forth below.  Defective merchandise that cannot be repaired by Derive can only  be returned in exchange for the exact same merchandise or, at Derive’s sole discretion, the purchase price can be refunded to the original method of payment you used for the purchase. Derive will not accept returns of merchandise based on damage or shortage claims that are not noted by the delivery service and reflected on the bill of

lading (or otherwise reflected in a damage report) created at the time of delivery.        Replacement items will be sent to the original "ship to" address upon receipt of the original item at our Technical Support Department, as long as the item is still in stock.  Should a replacement no longer be available, you will be notified  that a refund has been issued instead.

Defective merchandise must be returned to Derive in original packaging and in good condition. If you follow the procedures described below, upon the return of merchandise which Derive finds to be defective, Derive will, at no cost to you, ship a replacement. Derive may, in  its sole discretion, issue you a refund in lieu of replacing defective merchandise in which case Derive will refund your purchase price, less the original shipping cost, less a 25% restocking fee. Please contact our Technical Support Department (for SCT branded merchandise: (407) 774- 2447; for Bully Dog branded merchandise: (940) 783-9915) to discuss any questions you have regarding defective merchandise.

If your return of defective merchandise fails to meet the applicable criteria listed below, or is otherwise not verified as being covered by Derive’s Limited Warranty for such merchandise, the merchandise will be returned to you at your cost. All requests for repair and/or return of defective merchandise must include the following at the time of return: Return Merchandise Authorization (“RMA”) number, which is obtained by calling our Technical Support Department (for SCT branded merchandise: (407) 774-2447; for

Bully Dog branded merchandise: (940) 783-9915), and will be issued by them after verifying the problem with the merchandise cannot be remedied without returning the merchandise for Original shipping packaging (original box, packing materials, ) Original packing slip and UPC barcode Purchase receipt, or other satisfactory proof of purchase date
The returned merchandise must be complete and include all parts Manufacturer documentation (manuals, warranty cards, registration information, etc.) Please write the RMA on the address label used to return the defective merchandise to Derive.  The RMA just not be written on the original manufacturer’s packaging or box.

Derive will not issue an RMA without you first diagnosing the problem with our Technical Support Department. You may diagnose a problem by contacting our Technical Support Department via phone (for SCT branded merchandise: (407) 774-2447; for Bully Dog branded merchandise: (940) 783-9915) or email the ebay store contact. Many issues with the devices can be resolved with diagnosis and repair in the field. If you choose to correspond by email, please provide an accurate description of BOTH the product and the product problem to the technician who is processing the RMA. If you choose to contact the Technical Support Department by phone to diagnose the problem, then please make sure you have the device present and a computer available in order to be efficiently diagnosed.

After verifying that the problem with the device cannot be remedied without returning the merchandise for repairs, the Technical Support Department will issue you an RMA. You must keep a copy of this number for your records as well as clearly mark the RMA on the outside of the shipping box. If the RMA number is not written on the outside of the box the shipment will be refused. Once Derive receives the device, the issue will be verified and the device will be repaired and returned to the address specified in the RMA. Customary turnaround time is 7 to 10 business days from date received. If there are multiple items being sent for repair, please be sure to label each item indicating the problem.  If service fees for a repaired device are not paid within 90 days of such repairs, the device will become the property of Derive and you will no longer have any rights to such item or any replacement thereof.

Any warranty repairs on, or warranty replacement of, defective merchandise shall extend the applicable warranty by an additional 60 days following such repairs or replacement.