2024-2026 Duramax L5P Peakside HP Tuners RTD4 Single Tune Package

This is the Single Tune Package. If you want the Five Tune Package, please click here.

This package includes the HP Tuners RTD4 (Gen 4 Remote Tuning Device), 8 universal HP Tuners credits and the Peakside Performance tune files. Already own an HP Tuners device? Order the tune files on their own instead.

Unleash the full potential of your 2024 - 2026 L5P Duramax with Peakside Performance Custom Tuning using the HP Tuners RTD4 (Remote Tuning Device). Designed for seamless remote calibration, this setup gives you the same power, drivability, and refinement as an in-shop tune, without ever leaving your driveway. Our custom calibrations are built to enhance throttle response, torque delivery, towing performance, and fuel efficiency, all while maintaining factory safety protocols.

Important: This tuning requires an E42 ECM that has been unlocked by HP Tuners. The ECM unlock is not included in this package. Click here for the E42 ECM Upgrade Service. The 8 Universal HP Tuners credits this tuning needs are included.

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

• RTD Gen 4 Remote Tuning Device (R04-PL0-00)
• 8 Universal HP Tuners Credits
• Peakside Performance Single Tune custom tune files (PEAK-L5P-HPTUN-SGL)

• Custom tuning for the latest 2024 - 2026 GM L5P Duramax operating systems.
• Seamless remote tuning through HP Tuners TDN (Tune Delivery Network).
• Custom torque management and shift refinement for improved drivability.
• Optimized towing, economy, and performance tune options.
• Improved throttle mapping and reduced turbo lag.
• RTD4 device and 8 credits included
  • Older MPVI2/3 units are not compatible with the Global B architecture
• Stock reads and INFO logs required before files are built

1. Plug your RTD4 into the OBDII port and connect via Bluetooth or USB.
2. Use the HP Tuners TDN app to send your stock file to Peakside Performance. Once you order, we will email you an invite link to accept us to be your tuner.
3. Receive your custom tune directly through the app, no shipping required.
4. Flash your new tune, drive, and feel the difference.

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