EvoHT2 with ECM/TCM Unlock for 2020-2023 GM L5P Duramax

EvoHT2 for 20-23 GM Duramax - Now with ECM and TCM Tuning!

Part # 26401
2 Reviews

EvoHT2 with ECM/TCM Unlock for 2020-2023 GM L5P Duramax

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This part is legal under the provisions of EPA’s Tampering Policy dated November 23rd, 2020.

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We've done yet again, pushing the L5P tuning market into an all new era with the industry's first in-vehicle ECM unlock including TCM trans tuning for 10-speed! That's right, flash your 2020-2023 GM Diesel with the all-new EvoHT2 programmer, without removing the ECM for unlock. Using our revolutionary Locksmith device and included unlock cables, the EvoHT2 now offers complete ECM/TCM unlocking without touching the ECM. No ECM cores to deal with. No finicky ECM harnesses to disconnect. No ECM swaps required. No shipping ECM's across the country. A complete plug and play flash tuning solution for 2020-2023 GM diesel owners. The big news here for 2020+ owners is the addition of TCM support for optimal transmission performance from your 10-speed Allison. Improved shift points, better clutch holding capacity from better line pressure and converter lock-up. Finally, that 10-speed will handle everything you can throw at it whether your daily driving, towing, or just our tearing up the streets. The EvoHT2 is a great tuning option with simple and easy to use interface, color screen and great visuals, and four pre-loaded tunes to meet every owners specific needs. Whether you're looking to improve your daily driving mileage, your towing performance or just shred some tires our EvoHT2 offers it all. This all-new process completely changes everything you once knew about tuning your L5P Duramax and will lead our industry into the future with even more capabilities, saving you time and money when it comes time to modify your truck. The EvoHT2 offers massive power gains (as much as 125hp/275tq to the tires) with improved throttle response, quicker turbo spool-up, better fuel economy and total control over your driving experience. Enable our 'Remember Last Setting' feature that allows your truck to remember your drive modes like Tow/Haul, Grade Braking, and Exhaust Brake settings every time you start your truck. At less than half the cost of the competitors ECM flash options, we won't nickel and dime you with extra hardware charges, expensive tuning credits and additional transmission tuning costs. With EvoHT2 for L5P Duramax Diesel you get it all up front for less. Unlock your L5P's max potential with Edge flash tuning today! A PC and our downloadable Update Agent software will be required in order to complete this tune process **Device can unlock and tune only one vehicle. Once the ECM/TCM is unlocked and flashed, the flash can be returned to factory settings, but the Unlock process can not be reversed. If VIN lock and ECM Unlock has been completed, device is non-returnable


  • In-vehicle ECM unlock with industry's first ECM/TCM unlock tool
  • Industry's first 10-speed transmission tuning included for better shift performance
  • Adds up to 125hp/275tq to the tires
  • Heavy Trailer 50hp/100tq, Economy 75hp/160tq, Light Trailer 90hp/180tq, Extreme 125hp/275tq
  • Extreme tune gains approximately 157hp at 3200 rpm's
  • Throttle Boost feature allows user adjustable pedal sensitivity (5-50% iover stock)
  • Remember last button setting for exhaust brake, drive mode, and grade braking
  • Calibrate speedometer for tire sizes 26-38"
  • Disable Top Speed Limiter
  • Adjust speed and rev limiters
  • TPMS Adjust
  • Read and clear DTC's
  • Adjust Idle Up feature for 600-1800rpms
  • Command manual DPF regeneration cycle
  • Allison Transmission Relearn
  • Enable/Disable/Reset Intake Air Filter Monitor System
  • Begin/Abort Crankshaft Position Sensor Learn
  • Great for daily driving and towing performance
  • Tuning has passed all in-house emissions testing with CARB EO submissions being processed
  • Calibrations developed to offer clean, efficient DPF friendly performance
  • Most cost effective way to add performance tuning to your L5P on the market today
  • Great option for owners already running our popular Insight CTS3 monitor but now crave added power
  • Clear Selection
Brand Edge
Check Clear DTCsYes
Emission Code7
Fuel TypeDiesel
Performance TunesHeavy Trailer, Economy, Light Trailer, Extreme
Product TypeHandheld Tuner
Sale CategoryEvoHT2
Part Number26401

This part is legal under the provisions of EPA’s Tampering Policy dated November 23rd, 2020. The company has reasonable basis (test results) to verify that this product allows the vehicle to operate within legal emissions standards and is therefore legal to be sold for on-street use in all states that accept the legal provisions of the Clean Air Act and the EPA Tampering Policy. This product is NOT LEGAL FOR SALE OR USE IN THE STATE OF CALIFORNIA. Testing with the California Air Resources Board, in order to achieve 50-state compliance, is pending with CARB. Once testing is complete with California, and an E.O. number is issued, this product will be updated to 50-state legal status.
Update Agent/Ignition Software
Update Agent/Ignition
It is strongly recommended that a battery charger be used during the ECM/TCM Unlock to ensure no voltage drop interrupts the process leaving an ECM in-operable.

Have a question about this product?

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    With this process and product being brand new on the market, your specific truck may have a more recent software that our calibrations database does not yet have tunes to support. In such a case, upon your initial update you'll be prompted with that information and our engineering and calibration teams will generate the required files for you. Please allow 1-2 business days for our calibrations team to add support for your vehicle. Your tuning device will not be able to unlock your vehicle until support is added. Once the support is ready, our system will email you and your device will be able to download the updated support via Update Agent for immediate unlock/flash tuning.


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    *Free Shipping & Handling only offered to the contiguous US on orders over $149, excludes clearance parts and oversized packages.

    Some parts are not legal for use in California or other states with similar regulations.