NWT - 17-26 Custom TCM Tuning - HP Tuners

17–26 L5P TCM Tuning — NWT Tuning by PIT Auto Performance

Unlock the full potential of your 2017–2026 L5P Duramax with NWT Tuning TCM tuning, sold and supported by PIT Auto Performance.

Our L5P TCM tuning is designed to optimize transmission performance, improve shift quality, and complement your engine calibration for a more responsive and refined driving experience

Important Unlock Disclaimer

2024–2026 model-year vehicles equipped with Global B TCMs require a TCM unlock service from HP Tuners prior to tuning. The unlock must be completed before the TCM can be calibrated. Unlock services are separate from the NWT Tuning calibration and are subject to HP Tuners' current availability, requirements, and pricing.

Please verify your vehicle's model year, TCM type, and tuning requirements before purchasing. TCM compatibility and available tuning options can vary by vehicle configuration.

After ordering: Use your tuning device to read the vehicle’s TCM and save the read file. Email the completed TCM read file to sales@pitautoperformance.com along with your tuning device serial number and Order Confirmation Number.