Description

The Derringer High Output for the 2023 L5P Duramax wakes up your Chevy/GMC 2500/3500 HD — from 419 hp and 835 lb-ft to a real 523 hp and 1,039 lb-ft. That's +117 hp and +225 lb-ft on tap, spread across six on-the-fly power levels you control from the included iDash Pro. Plug it in at the OBD-II port, run wires to the truck's MAP and fuel rail sensors, and you're done — no ECM reflash, no warranty trace.

Includes the new iDash Pro Powertrain Information Center with Bluetooth mobile app — six levels, real-time EGT, coolant, boost monitoring, and wireless calibration updates straight from your phone.

Fitment

Features

• +117 hp / +225 lb-ft peak gains over stock
• Six on-the-fly power levels, ~23 hp per level
• Includes iDash Pro 5" full-color Powertrain Information Center with Bluetooth mobile app
• AutoRate dynamic tuning — adjusts in real time using vehicle diagnostics 100×/second
• Patented ActiveSafety circuitry protects engine and powertrain
• TransCommand intelligent shift tuning for transmission protection
• Altitude compensation — full power at any elevation
• 10% cooler EGTs than competitor tuners (no over-fueling)
• Works during cruise control
• Wireless firmware and calibration updates via Bluetooth
• Warranty-friendly — no reflash required, no trace in ECM after removal
• 50-state compliant

Specifications

• Stock: 419 hp / 835 lb-ft
• Tuned: 523 hp / 1,039 lb-ft
• Fuel economy: up to 6% better than over-fueled competitors
• 30-second full-power timer at WOT before transition
• Configurations: Single Alternator and Dual Alternator

What's in the Box

• Derringer High Output tuner module
• iDash Pro 5" display unit with mount
• OBD-II wiring harness
• Sensor harnesses (MAP, fuel rail)
• Installation hardware
• Owner's manual + product registration card

Want Data Logging Instead?

This is the iDash Pro bundle. For the data-logging version, see the 2023 Duramax Banks Derringer HO Tuner w/ iDash Data Pro (67127).

Activation fee may be subject to change.