2020-2025 GM 2500HD/3500HD 6.6L L5P Duramax Chips, Modules & Tuners

The factory PCM programming in your 2020-2025 GM 2500HD/3500HD may get the job done for a stock-equipped truck, but there’s a ton of untapped power and potential  hidden under the hood of your 6.6L Duramax L5P that's just waiting to get unleashed. Premium performance tuners help unlock more horsepower, torque, and throttle response by optimizing your truck's ECM settings, helping you get the most out of your modified build. These tuners not only improve power but also allow you to correct for larger tires, changes in gear ratio, or new exhaust systems that require custom tuning. And many of these devices even double as vehicle monitors, keeping track of your truck’s vital engine parameters so you can spot issues before they turn into costly problems.  GM Duramax Fitments: 2020, 2021, 2022, 2023, 2024, 2025 GM 6.6L Duramax. Submodel Fitments: WT, Custom, LT, LTZ, High Country, 1LT, 2LT, Pro, SLE, SLT, AT4, Denali. Some exceptions apply, please see individual product pages for specific fitments.