GM Duramax OBD2 Flash Emissions-On Tuning Kit (2001–2023)

Unlock the Full Potential of Your GM Duramax — Emissions-Compliant Performance

The OBD2 Flash Emissions-On Tuning Kit is engineered to boost performance on 2001–2023 GM Duramax trucks while keeping all emissions systems intact. Designed for both enthusiasts and professionals, it delivers more power, stronger towing capability, and reduced strain on engine components.

Why Choose This Tuner?

• Increases horsepower and torque for improved towing performance

• Optimizes engine operation for cooler running temperatures

• Reduces the frequency of DPF regeneration cycles

• Maintains full emissions system functionality

• Offers advanced control over key engine parameters

Vehicle Compatibility – Select Your Year & Engine:

• 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 (includes ECM E41 Upgrade & Unlock Kit)

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

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

• 2022–2022.5 Silverado / Sierra 1500 – 3.0L Duramax LM2 (requires L5P E66 ECM Service — not included, ECM must be sent in)

📌 Important Notes:

• The L5P (2017–2023) and L5D (2019–2023) kits include the ECM E41 Upgrade & Unlock Kit.

• The 2020–2022 LM2 kit includes the GM E46 ECM Upgrade Service.

• The 2022–2022.5 LM2 kit does not include the required L5P E66 ECM Service — you must send in your ECM separately for this upgrade.

What’s Included in the Kit:

• OBD2 Flash Tuning Device

• Preloaded credits matched to your specific vehicle and tune

• Comprehensive tuning software for scanning, diagnostics, logging, and calibration

• USB and programming cables

• Standalone, high-speed data logging with expanded storage

How It Works:

• Select the correct kit for your vehicle’s year and engine.

• Receive your preloaded tuning device.

• Read your vehicle’s control module to create an info log.

• Send the log and read file to Dynamic Diesels via the contact form.

• Get your custom tune file from our tuning specialists.

• Flash the tune to your vehicle and enjoy the performance improvements.

A full step-by-step guide for reading and writing tunes is available [here].

⚠️ For off-road use only.

🔍 Fitment

Vehicle-Specific — Compatible only with GM Duramax models (2001–2023) listed above.