Fits: 2024 thru 2025 Chevy Silverado/GMC Sierra 2500HD/3500HD L5P Duramax Diesel 

THE MANUFACTURE, SALE, OFFER FOR SALE, OR INSTALLATION OF THIS PRODUCT IS NOT LEGAL IN CALIFORNIA.

Banks all-new Derringer High Output tuner brings the 2024-25 Chevy/GMC Duramax 6.6L from 438 hp and 928 Ib-ft to a tire-shredding 519 hp and 1068 Ib-ft. The system provides a massive increase in torque across the working range of the engine. Merging, passing, and uphill climbs while towing are easier than ever. The system includes your choice of the all-new iDash Pro or iDash Data Pro Powertrain Information Center, the most advanced automotive evaluation tool. The Derringer system communicates with the truck's ECM to adjust the tune in real-time, even compensating for altitude. Patented ActiveSafety circuitry protects the engine and transmission, and the Derringer is warranty-friendly, leaving no trace left behind after removal. 

Derringer includes iDash Pro, the most advanced iDash ever. The iDash Pro Powertrain Information Center is a microcomputer that allows you to monitor and record what’s actually going on under your hood, as well as control Derringer, PedalMonster, and more. The compact device blows away the capabilities of any OBD plug-in diagnostic device and offers more functionality than instruments 5X the price.

Features: 

• Adds 86 hp and 178 lb-ft at the wheels

• 6 power levels that can be changed on-the-fly via iDash

• Interfaces with OBD (On-Board Diagnostics) to communicate with vehicle's ECM

• Warranty friendly: no reflash required and no trace left after removal

• Works while in cruise-control

• AutoRate tunes in real time using vehicle diagnostics

• ActiveSafety protects engine/powertrain

• Transcommand protects transmission

• Real-time bar graph on iDash displays Derringer's added power

• Control, monitor, and update wirelessly via iDash Pro's Bluetooth connectivity

DmaxStore Notes: 

• Derringer is the only tuner available with Active Safety® health monitoring circuitry

• Internal diagnostics checks the system 100 times per second

• Checks MAP and FRP signals and monitors CPU activity

• Activates in the event of failure or loss of 12-volt power

• Bypass relays smoothly return stock power with no loss of power or "Limp Mode"

• Wireless transfer of data logs coming soon for iDash Data Pro users.

Instructions:

• Derringer High Output Install with Single Alternator

• Derringer High Output Install with Dual Alternators

Boost Control Where You Need It

Derringer provides a huge increase in torque across the working range of the engine between 2200 and 2800 RPM. We accomplish this by controlling midrange boost. Look at the yellow zone. Mid-range boost equals mid-range torque.