2020-2023 Duramax AMDP HP Tuners Custom Tune File

Note: Tuning Credits Required (See Add-ons)
These are only the tune files. If you also require hardware: 2020-2023 L5P Custom Tune Package.

Unlock your L5P's true potential with AMDP Custom Tuning. These tune files will range from 0HP Modified up to 150HP Race tunes. Still wanting more power? We can have these custom tune files written to accommodate any modifications your truck may have, just let us know!

Optional Add-On

• ECM Credits
• TCM Credits
• TCM Tune Files

All Tuning will give you full access to calibrate, log, and scan via the OBD2 port. This tune file requires an HP Tuners MPVI3 or MPVI4 and VCM Suite 4.3+!

We do not support lope tunes or smoke tunes.

TCM Tuning

TCM Tuning is optional but highly recommended. Each TCM File will be built to suit and will include line pressure improvements to hold all the extra power that is made.

• Crisp, Firm Shifts: Shift firmness and timing are adjusted to remove sluggish factory shifting for faster, more positive gear changes.
• Increased Line Pressure: More holding power so the clutches stay planted under the added torque from your engine tune.
• Adjusted Shift Points: Tuned to keep your truck in its power band and prevent lugging, with setups for stock or larger tires.
• Torque Converter Lockup: Firmer, refined converter lockup for better power delivery, less slip, and reduced heat when towing.
• Torque Management: Adjusted so the transmission works with your AMDP engine tuning instead of pulling power during shifts.
• Better Drivability Under Load: Smoother, more confident shifting whether you are daily driving, towing heavy, or running the higher power levels.

SOTF Tuning

When selecting SOTF tuning, you have the ability to utilize the Cruise Control Method (Read More Here) which would be accessed via your steering wheel. SOTF tuning gives you all five power levels and lets you change between them on the fly using the factory steering wheel controls, with no reflashing needed to change levels. If you prefer a manual toggle switch, be sure to select the addon. If you do not select the addon, your SOTF tuning will automatically default to the Cruise Control Method.

On 2020-2023 models the ECM unlocks through the OBD port with your MPVI3 or MPVI4, no unlock box or send-in service needed. Click here to learn more.

• 4 Tuning Credits Required for engine tuning, or 8 credits for engine & transmission tuning (Available via Addons)
• CAN Bus Plugs are required for emissions-off tuning.

You will need to read the stock file of the truck with the HPTuners MPVI3 or MPVI4 Device. Once you send us that stock file, we can send you the custom tuning to suit your truck. It's a very quick and easy process and will come with step-by-step instructions.

Installation Instructions:

• Click here to view Tuning Instructions
• Click Here For SOTF Installation Instructions

Tuning Instructional Video:

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