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SKU #: BAN-66682 Banks 66682 Derringer Tuner 17-19 6.6L GM Duramax L5P

Purchase Banks 66682 Derringer Tuner 17-19 6.6L GM Duramax L5P
    • 2017-2018 6.6L GM Duramax L5P
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Add power and fuel economy to your L5P Duramax with the most trusted name in diesel performance, Banks Power. Stop the competition dead in their tracks with the Derringer Tuner. Banks delivers torque ... read more

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Add power and fuel economy to your L5P Duramax with the most trusted name in diesel performance, Banks Power.

Stop the competition dead in their tracks with the Derringer Tuner. Banks delivers torque and power gains across the full operating rpm range, starting right off idle and marching to the shift point in each gear. Derringer is dyno calibrated to use multiple data inputs such as throttle position, RPM, vehicle speed, AFR, knock and coolant temperature, just like your engine's ECU. Its microprocessor based electronics are able to actively and safely optimize calibrations in real time. No competitive product does that.

Derringer has three switched settings: Stock, Plus and Sport. Sport produces Best in Class performance knocks you back in your seat. The Plus setting is for work use and has great mid-range feel. When running Plus with a loaded work truck and/or pulling a trailer, your on ramp merging speeds and passing times are greatly improved.

The electronics are molded into a waterproof connector, which is easily concealed and communicates using B-Bus (Banks Bus) with other devices such as the iDash 1.8 Super Gauge/Control Center. The Derringer connects in line with the Throttle Inlet Pressure (TIP) and Manifold Absolute Pressure (MAP) sensors. But, unlike others it also connects to the vehicle's OBDII diagnostic bus connector. A CAN (controller area network) transceiver chip communicates with OBD or B-Bus allowing Banks' microprocessors to talk with the vehicle. On top of that, Derringer's special coolant temp watchdog prevents power addition when the engine is too cold or overheated. The Derringer also auto-adjusts power if knock occurs due to bad fuel. Maximum safe power is all automatic with a Derringer, you just choose your setting.

The Banks difference when it comes to L5P POWER! - The Derringer tuner When it comes down to it, you want a real L5P tuner. You want something that makes big power and doesn't kill your truck. After all, you just spent a lot of money on that beast. The Banks Derringer L5P tuner is the only option you should be plugging into your truck.

How the Derringer does what it does, and why. There's no easy way to make more power for your daily driven L5P with GM's ECU and factory turbo, no magic flash or special "chip" available. Banks had to go the tuner route, and making an inline tuner for your truck was no easy task. Banks has almost a thousand man-hours into Derringer development. Fortunately, they've been making tuners for 20 years, so it was all in a day's work.

The Derringer is a plug-and-play microcomputer designed for easy installation, it's waterproof for convenient under hood mounting, and connects to the iDash 1.8 Super Gauge for the ultimate in information and power selection, unlocking three additional power levels.

AutoRate - Unlike the fixed tuning used by others, the Derringer calibration is continuously adjusting to provide you the peak possible performance under every driving condition. By utilizing the power of the OBD-II data, the tuner intelligently fine-tunes its calibration on the fly without you having to change its power level.

  • Exhaust Gas Temperature (EGT) - The Derringer senses your engine's EGT and intelligently modulates fueling to maintain a safe maximum EGT, protecting your turbo and engine.
  • Altitude compensation - The Derringer senses ambient air pressure, controlling the turbocharger to maintain added boost and power as altitude increases.
  • Diesel Particulate Filter (DPF) Regen - The Derringer tuner constantly monitors your DPF regen status and will optimize its calibration to ensure the DPF regen process completes successfully.
  • Accelerator Pedal Monitoring - The Derringer senses accelerator pedal position to roll in additional power progressively, optimizing part-throttle fuel economy and giving max power when you ask for it.
  • Coolant Temperature Monitoring - The Derringer senses coolant temp to control added power. During warmup, no power is added below 120° F, then power is ramped in and fully available above 150° If the coolant overheats for any reason, the Derringer starts removing its power at 230° F and additional power is totally removed if you exceed 240° F.
  • Full Power Timer - If set on Sport level, the Derringer allows for 30 seconds of wide open throttle before transitioning to the recommended power level for sustained tow/haul. (Our research has shown that the stock L5P when at full power will hit 1450° EGT and after a minute or so will pull out fuel to cool things down. So, we do the same thing.)

TransCommand Active Transmission Safety System - In addition to AutoRate Adaptive Tuning, the Derringer utilizes key engine and transmission parameters to enhance shift performance and improve the longevity of your transmission. Because the competitors lack the essential OBD-II data, they always add power at wide open throttle no matter what! This can cause excessive transmission slip, torque converter clutch slip and even 170 HP engine derates in order for the transmission to complete the shift. This harms the overall performance and degrades your transmission. The Derringer is meticulously calibrated and extensively tested to properly modulate power during shifting, optimizing performance and safety.

  • Intelligent Shift Tuning - The transmission shift request signal is monitored to optimize the power level prior to the shift protecting the transmission, increasing shift speed and avoiding ECU power derates.
  • Boost and Fuel by Gear - Gear based calibration allows for optimum traction and performance
  • Torque Converter Clutch Slip Monitoring - The Derringer adjusts to modulate TCC slip to safe levels.
  • Transmission Slip Monitoring - The Derringer adjusts calibration to modulate transmission slip to safe levels
  • ActiveSafety - The Derringer is the only tuner on the market to include Active Safety, an active failsafe system that utilizes bypass relays to smoothly transition your vehicle to stock power levels in the event of any trouble signs in the Derringer. The system constantly monitors various parameters at over 50 times a second to ensure that everything is operating as it should. If any competitive tuners lose power or fail in any way, they will instantly trigger a "limp home" mode where all power is lost and the vehicle dangerously slows to a crawl. If the same fault condition occurs to the Derringer it will gracefully remove its additional power and return to stock power levels without a hitch.

    • Internal self-diagnostics checks health of the system 50 times per second
    • Monitors MAP and FRP signals for out of range condition (disconnected or short circuit)
    • Watchdog timer constantly monitors CPU activity
    • Active safety engages if 12-volt power is lost to the Derringer tuner
    Additional Features
    • Simple plug and play installation with easy removal for dealer service
    • Warranty friendly: no reflash required and no traces left in ECU
    • 3 power levels with on the fly level changing (with switch)
    • Rugged waterproof design
    • LED Derringer status indicator
    • CARB EO applied for
    carb California Air Resource Board D-161-115


    • SkuBAN-66682
    • ManufacturerBanks Power
    • MPN66682
    • This product will not allow for the removal or disablement of factory emissions equipment, such as EGR (Exhaust Gas Recirculation) or DPF (Diesel Particulate Filter).
    • Product is not returnable if the packaging has been opened and/or product has been installed.
    • Easy installation
    • Loaded with features
    • Value priced
    • Destroys the competition, not your vehicle!
    • ActiveSafety protects engine/powertrain
    • Adds up to 61 hp and 112 lb-ft
    • 3 power levels
    • Interfaces with OBDII Port (On-Board Diagnostics/Information) to communicate directly with the vehicle ECU
    • Emissions compliant: Pending EO coverage in California


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    3 Reviews

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    Rate Banks 66682 Derringer Tuner 17-19 6.6L GM Duramax L5P

    Reviews may be edited for spelling or grammar inaccuracies and those containing profanity will be removed.

    Verified Buyer
    Easy Install
    I purchased the iDash to go with it and it is super nice to be able to read codes and clear codes with a touch. I can also monitor all the functions of the truck and the added power is super.
    Store Reply
    That’s awesome, glad you are happy with the tuner. We all want a little more power and performance it’s the American way! And you have one of the best ones out there. Next time you are looking for some parts shoot us a call!
    Verified Buyer
    would definitely buy again
    This product has really changed towing for me. It has made a big difference
    Store Reply
    Thanks so much for the review and really glad the Derringer is working well for you. Simple install, proven power, and the Banks name, hard to go wrong really.
    Verified Buyer
    I would buy it again any time.
    Installing was pretty straight forward, if you use the through the door method. I use it for general performance and towing. Made a big difference, I really like it. Worth to money, a good value for what you get.
    Store Reply
    Thank you for the review. Banks definitely knocked it out of the park with the L5P Derringer to deliver ease of use and great power.

    Will this remove the governor??

    This will not remove or change the factory governor no.


    Can I delete the DEF system with this purchase??

    No, Banks products are emissions compliant only.


    Does this tuner work as described on 2018 Silverado 3500 Duramax w/Allison transmission??

    Yes it will.


    Will this void the warranty??

    This unit is not traceable, therefor it may be removed without leaving trace.


    Will it improve gas mileage??

    Gas mileage no, however fuel economy may be gained. This is difficult to confirm however due to many many variables that can not be factored. Load, driver, engine condition, temps, elevation, tire size, gear ratio, etc. Some do experience fuel economy gains.


    Can you still run an Edge Insight monitor with this??

    No, they would both need to use the OBD port.


    Will this work on the 2019 duramax? And will it re calibrate the speedometer so I can run 35"" tires and have the speedo read correct??

    This tuner will work with a 2019 Duramax, but it will not re calibrate the speedometer. If you run the 1.8 iDash monitor, you will be able to see the corrected speed. -AH-


    I'm assuming I can add the gauge at any point later??

    Yes, it can be purchased separately. -AW

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    Banks 66682 Derringer Tuner 17-19 6.6L GM Duramax L5P

    Banks 66682 Derringer Tuner 17-19 6.6L GM Duramax L5P

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