2024 - 2026 L5D Duramax 4500 5500 6500 | HP Tuners

Unlock more usable power and performance from your 2024–2026 L5D Duramax 4500, 5500, or 6500 with custom HP Tuners calibration from Torque Works Diesel. Whether you’re looking for improved drivability, additional towing power, or stronger overall performance, our tuning is built around your truck and how you use it. Power levels range from stock optimized through 120HP, with dedicated heavy-tow options available. This platform requires an HP Tuners-unlocked ECM along with an MPVI3 or MPVI4 and 8 credits for flashing.

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Fits

• L5D Duramax 4500 5500 6500
• 2024 / 2025 / 2026
• Pickup and Cab Chassis / Incomplete Trucks

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ECM / TCM Unlock Information

• ECM is required to be sent into HP Tuners to be unlocked (we facilitate this process)

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The Benefits of Tuning

• Increased horsepower
• Increased torque
• Potential improvement in fuel economy
• Improved towing performance
• Customized drivability

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Power Levels

• Stock Power
• 10HP (Heavy Tow)
• 30HP (Heavy Tow)
• 50HP (Can tow 12k Lbs and under)
• 80HP
• 120HP

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How Does This Work?

1. Order your device, tuning package, and required parts.
2. Complete the Tune Order Form with your truck specifications and modifications.
3. We ship your device within 48 business hours.
4. Connect your device and send us the required stock readout. Instructions are provided.
5. Our calibrators write your custom tune files.
6. Your files are sent within 24-48 business hours after we receive all required information.
7. Follow the provided instructions to flash your truck and complete installation.

Our technicians are available for phone and technical support if assistance is needed during installation.

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What You'll Need

For a 2024-2026 L5D full kit, you’ll need:

• Device: MPVI3 or 4 with 8 credits
• Tune Package

The device is used to flash your custom tune file into the truck, while the required hardware addresses the applicable factory systems.

After purchase, tunes are typically completed within 24-48 business hours from the time you have purchased, submit stock read out [if needed], and submit the tune order form.

Devices typically ship within 48 business hours, after we have received all required vehicle information, submitted tune order form, and stock readout files.

Instructions are provided based on your specific package.

Software Downloads & Instructions

Please ensure you understand and comply with all applicable laws and regulations in your local jurisdiction before purchasing or installing this product. 

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Why Use Torque Works Diesel?

✅ In-house custom calibrations tailored to your truck and intended use
✅ Data-log support and revisions for drivability, reliability, and performance
✅ Financing available to make upgrades more manageable
✅ After-purchase support
✅ Detailed installation and flashing instructions
✅ Technical support included

At Torque Works Diesel, our tunes are custom written in-house.

You’re not receiving a generic third-party calibration used on every truck.

Built, tested, and refined in-house.

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Financing

Financing options are available to make your upgrades easier.

Financing Page

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See Our Customers

Check out trucks tuned by Torque Works Diesel:

Tuned by TWD Customer Page

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Questions?

FAQs

Email Us: Support@TorqueWorksDiesel.com