FITMEN
DESCRIPTION
Product Overview
-
This premium package is a 100% Digital Custom Tuning solution engineered specifically for the notorious 6.6L L5P Duramax platform using the HP Tuners network.
- We include the 6 Universal Credits directly in this package, covering the mandatory software licenses required by HP Tuners to flash your truck's advanced network.
- This digital delivery delivers sharp throttle response, maximized towing capacity, and heavy-duty drivetrain reliability built straight into one custom package.
Key Features
- Emissions-Off Security: Safely disables the failure-prone DPF, EGR, and SCR systems. Your L5P will never leave you stranded in forced speed-limitation modes on the highway again.
- 6 Universal Credits Pre-Loaded: Completely eliminates the hassle of purchasing separate licenses. Everything required to register your truck on the HP Tuners database is pre-packaged.
-
Massive Fuel Economy Gains: Optimizes fuel mapping and injection timing, leading to an immediate boost of 3 to 5 MPG under normal driving and highway cruising.
FAQ
Q: What is the process for getting my custom tune built?
A: Using a Windows PC laptop (Windows 7 or newer; Mac/Linux are not compatible), plug your HP Tuners device into your truck's OBD-II port to pull and save your original ECU stock file. Email that file to us along with your vehicle form, and our engineers will custom-tune it and send it back within 1–24 hours—the final flash takes just 30 minutes!
Q: Why do I need 6 credits for a 2017-2023 L5P Duramax?
A: General Motors implemented extreme encryption on the E41 computer controlling the L5P engine. HP Tuners requires 4 universal credits to license the engine computer and an additional 2 universal credits to license the transmission computer. We pack all 6 credits into this flat-rate bundle to save you the extra step.
Q: Is transmission tuning (TCM) included in this package?
A: No, transmission tuning is not included in this base package. However, we highly recommend adding it to protect your drivetrain from slipping under new power levels. You can pick it up as an upgrade here: Add Transmission Tuning to Cart
Q: How much will this file calibration improve my truck's fuel mileage?
A: By disabling factory exhaust regen cycles that waste diesel to burn soot, your engine efficiency skyrockets. Most owners report an immediate jump of 3 to 5 MPG (up to 7 MPG on the highway), allowing the fuel savings to pay for this package within a year.
