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Unleash the true performance potential of your 2024–2025 Duramax L5P with our high-output Performance Tune File. Built for serious diesel enthusiasts, this calibration pushes 600+ horsepower and an impressive 1,200 lb-ft of torque, while eliminating factory speed limiters for a smoother, more capable driving experience.
This tune requires a Global B E42 ECM that has been professionally unlocked prior to flashing. Once unlocked, the tune delivers up to +120 horsepower over stock, significantly improving throttle response, towing and pulling power, and overall drivability—without compromising reliability.