2017-2018 Chevy/GMC 2500/3500 6.6L Duramax L5P

The Derringer L5p Tuner from Banks Power is a plug and play microcomputer for the 2017-2018 Chevy/GMC 2500/3500 6.6L Duramax L5P. The gadget can be used as a standalone tuner with a power level switch or integrated with the iDash 1.8 Super Gauge DataMonster. Given the amount of science and research stuffed into this tuner, one would assume it was designed for the Mars Rover.

Watch Now: Derringer L5p Tuner, Real Power Is Here!

What Does This Mean For The Truck Community?

The Derringer L5P has a lot of impressive attributes are extremely useful in the truck community. Using an imagination in conjunction with the list of features below, it’s not hard to dream up a few scenarios where one could use a Derringer LP5.

derringer lp5 tuner


AutoRate® Features 
  • 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) RegenThe Derringer tuner constantly monitors your DPF regen status and will optimize its calibration to ensure the regen process completes successfully.

derringer lp5

AutoRate® Features Continued
  • 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.)


Watch Installation Video:

Additional Features & Infographics
  • 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

derringer l5p

Derringer lp5 tuner

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 derate 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.

derringer l5p


  • 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 GearGear based calibration allows for optimum traction and performance
  • Torque Converter Clutch Slip MonitoringThe Derringer adjusts to modulate TCC slip to safe levels.
  • Transmission Slip Monitoring The Derringer adjusts calibration to modulate transmission slip to safe levels


derringer l5p


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Gale Banks Engineering





(800) 601-8072


546 S Duggan Ave.

Azusa, CA 91702

ABOUT Gale Banks Engineering®

Banks Power is a division of Gale Banks Engineering, now in its 58th year, created by Southern California hot rodder and automobile engineer Gale Banks. Banks is best known for the advanced development of turbochargers and high-performance diesel engines targeting the automobile and marine aftermarket, and military customers.