The Banks Power Derringer Tuner (GEN2) gives your 2020 GM 6.6L Duramax L5P a feature packed tuner that is easy to install and offers big horsepower & torque gains. Choose from one of different 6 power levels, which can be controlled though the truck's cruise control. Adds up to 81hp and 144 lb-ft torque to really wake up your Duramax!


The Derringer microprocessor actively and safely optimizes calibrations in real time communicating with the truck ECM via OBD-II port (On-Board Diagnostics). It is dyno calibrated to use multiple data inputs such as throttle position, rpm, vehicle speed, EGT and coolant temperature. The AutoRate adjusts fuel and boost dynamically, while monitoring dozens of safety parameters. Also integrated by Banks is TransCommand to help protect the transmission, and ActiveSafety a fail-safe bypass.



  • Easy To Install
  • 6 Power Levels
  • Optimizes Calibrations in Real Time
  • Adds up to 81 hp and 144 lb-ft of Torque
  • No Re-Flashing Required & No Traces Left In ECM



Requires Banks iDash 1.8 DataMonster or Super Gauge (Not Included). To use without iDash, see Derringer w/Switch #67101

Not available for sale in the state of California  Click here to read Emissions Notice.

Banks Power Derringer Tuner (Gen2) (2020 6.6L L5P)

SKU: BP67100

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