FITMEN
DESCRIPTION
Product Overview
- The Duramax L5P V8 engine represent GM's flagship heavy-duty platform, but conservative factory ECM maps create noticeable dead-pedal throttle lag, sluggish shift hunting, and high exhaust temperatures under heavy loads.
- The Duramax L5P HP Tuners Custom Tuning Package provides a complete end-to-end software solution. Pre-bundled with the 6 Universal HP Tuners Credits required for ECM licensing, this custom file package installs seamlessly using HP Tuners MPVI2, MPVI2+, or MPVI3 interface and VCM Suite software.
- Engineered specifically for unlocked L5P E41 ECMs, this tune optimizes injection timing, turbo boost maps, and Allison transmission hydraulic pressure to unlock max horsepower, crisp shift response, and cooler towing temperatures.
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.
- Lower Towing EGTs & Maximize Efficiency: Optimizes boost pressure, fuel injection timing, and pulse width to keep EGTs safe while towing heavy trailers.
FAQ
Q: Does this package include the physical HP Tuners MPVI3 OBDII device or ECM unlocking service?
A: No. This product includes the Custom Tuning Calibration File and 6 HP Tuners Universal Credits. You must already have an HP Tuners MPVI2/MPVI2+/MPVI3 interface device and an unlocked L5P ECM.
Q: Why are 6 HP Tuners Credits included with this 2017–2023 L5P tuning file?
A: HP Tuners VCM Suite requires 6 Universal Credits to license the factory E41 ECM found on 2017–2023 GM 6.6L Duramax L5P trucks before custom tuning maps can be written to the vehicle. We bundle these credits directly into the order so you don't have to purchase them separately.
Q: How do I receive my tune file and HP Tuners credits after placing an order?
A: Once you submit your order along with your vehicle's VIN and HP Tuners MPVI serial number, your 6 credits will be deposited directly to your HP Tuners device/account, and your custom L5P tune file will be delivered via email or secure download link.
Q: Can I re-flash my truck back to stock using this software if needed?
A: Yes. Using your HP Tuners interface and VCM Suite software, you can save your stock ECM file and re-flash back to stock settings at any time.
