Unlock the full potential of your Duramax with the Banks Derringer High Output Tuner with iDash DataMonster. Developed specifically for 2020-2022 Chevrolet Silverado HD and GMC Sierra HD trucks powered by the 6.6L Duramax L5P, this intelligent tuning system safely delivers up to 117 additional horsepower and 225 lb-ft of torque while preserving factory drivability, towing capability and engine reliability.

Unlike traditional plug-in modules, Derringer communicates directly with the vehicle's OBD-II network, continuously monitoring engine conditions and adjusting power in real time. The result is smooth, responsive performance whether you're towing, climbing steep grades or simply enjoying stronger acceleration.

Included is the premium Banks iDash DataMonster, giving you far more than a performance gauge. In addition to displaying hundreds of live engine and transmission parameters, the DataMonster features built-in data logging, performance timers, 0-100 km/h and quarter-mile testing, record/playback functions, user-configurable alarms and Bluetooth connectivity for wireless firmware updates through the Banks mobile app.

Banks' exclusive AutoRate® Dynamic Tuning constantly adapts power output based on engine load, temperatures and altitude to maximise safe performance. ActiveSafety® monitors the system up to 100 times per second, while TransCommand® intelligently manages torque delivery during Allison 10-speed gear changes to help protect the transmission under heavy loads.

Installation is fully reversible with no ECU reflash required, leaving no trace in the factory ECM after removal while remaining 50-State emissions compliant.

Key Features

• Genuine Banks Derringer High Output Tuner
• Includes Banks iDash DataMonster
• Up to +117 horsepower
• Up to +225 lb-ft torque
• Six selectable power levels
• Adjustable while driving
• AutoRate® Dynamic Tuning
• ActiveSafety® engine protection
• TransCommand® transmission protection
• OBD-II communication with factory ECM
• Built-in data logging and playback
• Performance timers and acceleration testing
• Bluetooth firmware updates
• No ECU reflash required
• Leaves no trace in factory ECM
• 50-State emissions compliant
• Genuine Banks Power product
• Part Number: 67126

Compatibility

Chevrolet

• Silverado 2500HD (2020-2022)
• Silverado 3500HD (2020-2022)

GMC

• Sierra 2500HD (2020-2022)
• Sierra 3500HD (2020-2022)

Engine

• 6.6L Duramax L5P Turbo Diesel

Fitment Notes

• Includes Banks iDash DataMonster with full data logging capability.
• Six selectable power levels.
• Plug-and-play installation.
• Compatible with Allison 10-speed automatic transmission.
• No ECU reflash required.
• Leaves no footprint in the factory ECM after removal.
• CARB EO D-161-167.
• iDash mount sold separately