2017-2023 Duramax Peakside HP Tuners Single Tune File

Note: THESE FILES NO LONGER NEED AN UNLOCK BOX TO FLASH 19+, USING AN MPVI3, YOU ARE NOW ABLE TO UNLOCK/FLASH YOUR ECM.

This includes a single custom tune file from Peakside Performance for your 2017-2023 L5P Duramax. Calibrations are delivered through the HP Tuners MPVI or RTD4 interface and are designed to maximize your truck's performance and fuel economy for the specific power level you select.

You need an HP Tuners device and credits to flash these tunes. Click here for the MPVI, click here for the RTD4 and here for the credits. (You only need one of these devices).

RTD4 Users: Your stock read goes to your tuner in the TDN app and your tune file comes back the same way.

Part Number: PEAK-L5P-HPTUN-1723-SGL

• Modified Stock
• +45 HP
• +75 HP
• +90 HP
• +120 HP

Note: Higher Power levels can be written with the proper supporting modifications. Please state the desired HP level and all supporting modifications when submitting your request.

• Includes one custom L5P Duramax tune file from Peakside Performance.
• MPVI interface allows for direct ECM unlock/flash (no separate unlock box required).
• Requires HP Tuners MPVI device and credits
  • Compatible with MPVI2. MPVI3 MPVI4 & RTD4 Devices
• Select your ideal performance level (up to +120 HP).
• Designed for superior driveability and fuel economy.

• Credits Required: 4 Universal HP Tuners. Credits are Required to Flash.
• MPVI Users: We require a stock FICM read with HP Tuners if using an MPVI.

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