HP TUNE FILES (2017-2019 DURAMAX L5P) TCM ONLY

Shift Smarter, Tow Harder with Custom TCM Calibration

Unlock the full potential of your 2017–2019 L5P Duramax by tuning the transmission control module (TCM) with HP Tuners. This calibration refines every gear change, increases holding power, and eliminates factory shift limitations that hold your truck back. Whether you're hauling heavy loads or chasing peak performance, this TCM tune ensures your Allison transmission is always in the right gear at the right time.

✅ What’s Included:

Custom HP Tuners TCM tune file for 2017–2019 L5P Duramax
Built to match your VIN, tire size, power level, and driving style
Variants Available: Tow, Street, Eco, or Max HP

🔧 Key Benefits:

Faster, firmer, and smarter shift strategies
Raised torque limits and optimized clutch engagement
Improved drivability under load and at wide-open throttle
Seamless integration with existing HP Tuners ECM files

🚙 Vehicle Fitment:

2017–2019 Chevrolet Silverado / GMC Sierra 2500HD & 3500HD
Engine: 6.6L L5P Duramax
Transmission: Allison 6-speed
Tuning Platform: HP Tuners (TCM required to be unlocked)
Delivery: Digital via Email