GMC Sierra HD owners looking to squeeze more performance from their Duramax engines now have a new plug-and-play solution, courtesy of the folks from Gale Banks Engineering.
The well-known diesel performance experts at Banks Power have introduced the Derringer High Output tuner, providing a quick and easy boost for 2024-through-2025 GMC Sierra HD pickups equipped with the 6.6L V8 L5P turbodiesel Duramax engine.
In its peak performance setting, the Derringer High Output tuner adds 86 horsepower and 178 pound-feet of torque, with power gains focused in the 2,200 to 2,800 RPM range, making it ideal for highway merges, towing, and hill climbs. Banks notes that this same mid-range torque strategy is used in military-grade JLTV applications, emphasizing durability and real-world usability over peak dyno figures alone.
Banks demonstrates the High Output tuner’s capabilities with a series of performance tests. Using a 2024 Sierra HD towing a trailer loaded with a Toyota Tacoma, the company saw significant real-world gains. In an on-ramp acceleration test to 70 mph, the stock truck required 1,279 feet, while the Derringer-equipped Sierra needed only 1,085 feet, making for a reduction of nearly 200 feet. Then, on a simulated seven-percent uphill grade, the stock truck took over 23 seconds and nearly 3,000 feet to accelerate from 45 to 70 mph. With the Derringer, those figures were cut to just over 15 seconds and 1,336 feet, an 8.5-second, 36-percent improvement.
The Derringer High Output system features six selectable power levels. Level 2 optimizes fuel economy, Levels 3 and 4 are tuned for towing and work applications, and Levels 5 and 6 unleash the tuner’s full performance potential. All levels are accessed via the Banks iDash Pro, a digital interface that displays real-time engine data, allows on-the-fly tuning, and integrates with Banks’ optional PedalMonster throttle controller.
The new tuner starting price is set at $978, with iDash Pro or iDash Data Pro required for operation. Check it out in action right here:
Comments
I’m curious why your article specifically says the Banks Derringer was tested on a GMC Sierra when the video shows it being tested on a Chevrolet Silverado. I recognize the engines are the same, so why not say it was tested on a Duramax?
Never mind that for those interested in reducing carbon emissions and over all global warming, you can increase fuel economy more, increase horsepower a good bit more, and greatly increase expected lifespan of the engine. Just remember to swap back to the Allison 6 speed.
What about us poor fools who are suffering in 50 state emissions states?
Sorry, it’s just a case of the few rule the many…
“Emphasizing durability and real-world usability”
If the motors (and drivetrains) can do this all day every day with no side effects, why aren’t they calibrated to these numbers from the factory? Esp. with competition like the Ford Power Strokes out there?
Maybe this setup works. But remember anything that breaks will start out at $10,000, so be careful when playing with stuff you found on the Internet…
Ouch, ford isn’t honest with the power stroke numbers. Pickle, global warming is 100% debunked!
Banks is a magician with the duramax!