GM Duramax Custom OBD2 Emissions-Compliant Tune Files (2001–2023)

Boost your GM Duramax performance with a custom OBD2 tune file designed for your exact engine and model year. Whether you're looking for better towing power, improved throttle response, or increased fuel efficiency — this emissions-on tune delivers enhanced performance without compromising factory emissions equipment.

Key Benefits:

• Increased horsepower and torque for stronger towing and hauling

• Improved throttle response and smoother acceleration

• Reduced DPF regen frequency and optimized combustion temperatures

• Fine-tuned engine parameters to reduce wear and improve overall efficiency

Compatible Models (2001–2023):

• 2001–2004 Silverado/Sierra Duramax (LB7)

• 2004.5–2005 Silverado/Sierra Duramax (LLY)

• 2006–2010 Silverado/Sierra Duramax (LBZ/LMM)

• 2011–2016 Silverado/Sierra Duramax (LML)

• 2017–2023 Silverado/Sierra Duramax (L5P)
  Requires E41 ECM Upgrade & Unlock Kit

• 2019–2023 Silverado/Sierra 6.6L Duramax (L5D)
  Requires E41 ECM Upgrade & Unlock Kit

• 2020–2022 Silverado/Sierra 1500 3.0L Duramax (LM2)
  Requires GM E46 ECM Upgrade Service

• 2022–2022.5 Silverado/Sierra 1500 3.0L Duramax (LM2)
  Requires L5P E66 ECM Service — ECM must be shipped in for tuning

Vehicle-Specific Notes:

• For L5P and L5D models (2017–2023), Dynamic Diesels includes the ECM E41 Upgrade & Unlock Kit.

• For 2020–2022 LM2 models, the GM E46 ECM Upgrade Service is included.

• For 2022–2022.5 LM2 models, the required ECM service is not included — you must send in your ECM for tuning (shipping instructions available).

How It Works:

• Purchase the Tune File: Choose the correct year/engine option.

• Read Your Vehicle: Use your OBD2 tuning device to pull an info log and read file.

• Send Your Files: Submit your log and read file using [Dynamic Diesels’ contact form].

• Get Your Custom Tune: Our in-house tuning specialist builds and sends your optimized tune file.

• Flash the Tune: Upload the file to your device and flash it to your truck.

Important Notes:

• Tune file only — no hardware or tuning device is included.

• For off-road or competition use only, where permitted by law.

• Requires a compatible OBD2 tuning device (not included).

Give your Duramax the custom performance it deserves — with precision tuning from Dynamic Diesels, tailored to your truck and built for results.

Product Type: Vehicle-Specific
(Each tune is customized for specific model years and engine codes)

Note: This listing includes the tune file only — no hardware or tuning device is included. Image shown is for illustrative purposes.