NWT Tuning — 2024–2026 L5P Duramax Custom ECM & TCM Tuning

Get custom NWT Tuning calibration for your 2024–2026 GM 6.6L L5P Duramax using HP Tuners.

Our custom tuning is developed for your specific truck, modifications, and intended use, with options for ECM tuning, TCM tuning, or both.

Required Before Tuning

The 2024–2026 L5P uses GM Global B modules that require an HP Tuners upgrade before they can be tuned.

• E42 ECM: HP Tuners E42 Global B upgrade required — 8 Universal Credits
• T93 TCM: HP Tuners T93 Global B upgrade required — 4 Universal Credits
• ECM + TCM: 12 Universal Credits total

The required module upgrades are performed by HP Tuners and are separate from NWT Tuning's custom tuning service and HP Tuners licensing credits.

Once your upgraded module(s) are returned, reinstall them in the vehicle and use HP Tuners VCM Editor to perform a Read Vehicle. Save the original read file and submit it to NWT Tuning through your tuning order.

What We Need From You

Please email the following to sales@pitautoperformance.com once order is complete:

• Original vehicle read file
• Order Confirmation Number
• Complete list of engine and drivetrain modifications
• Tire size 
• Device Serial Number
• Any other information that may affect calibration