Fits
| Year | Make | Model |
| 2017-2023 | Chevrolet/GMC | 2500HD/3500HD w/ 6.6L L5P Duramax |
Take your 6.6L L5P Duramax's performance to the next level with AMDP’s specialized transmission tuning designed specifically for the Allison 10-speed and 6-speed units. By optimizing shift points and increasing line pressure, this tune ensures your Duramax delivers power to the ground efficiently while significantly reducing clutch slippage. Whether you're towing heavy or seeking a crisper street drive, this calibration delivers the reliability and refinement your heavy-duty drivetrain deserves.
IMPORTANT: 2020–2023 models (T93 TCM) require an unlock before tuning. We recommend purchasing a pre-unlocked T93 TCM for the simplest installation. Alternatively, you can add the HP Tuners T93 Unlock Tool to your order to perform the unlock on-site without removing the TCM from the vehicle.
Part Number: L5P-T / L5P-T-C
Features
- Optimized Shift Strategy
- Increased Line Pressure
- Improved Torque Converter Lockup
- Enhanced Towing Performance
- Smoother Gear Transitions
- Reduced Transmission Temperatures
Includes
- Digital Tune File
- Available with or without HP Tuners Credits (Required if you have not previously licensed/flashed the TCM before)
| HP Tuners Credits |
No Credits, Add Credits (4) |
|---|