2024-2026 L5P Duramax HP Tuners RTD4 Files

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This tuning requires 8 Universal HP Tuner Credits!

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.

Peakside Performance Custom Tuning

Our custom calibrations are built to enhance throttle response, torque delivery, towing performance, and fuel efficiency — all while maintaining factory safety protocols. Whether you’re daily driving, hauling, or racing, we fine-tune every aspect of your Duramax’s ECM and TCM to deliver smooth power where it counts.

Features

- Supports 2024–2026 GM L5P Duramax trucks with the latest ECM/TCM 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

How It Works

1. Plug in your RTD4 to 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.

Why Choose Peakside Performance

At Peakside Performance, we specialize in diesel calibration that balances power, reliability, and control. Our L5P tuning is tested in-house on real-world trucks — not just dyno numbers. From the dyno to the steep towing grades, we have you covered. Every tune is designed to give your Duramax the attitude, sound, and pulling power it deserves.