Duramax 6.6L HP Tuner File 2017–2023 | Includes Tuning File + 6 Credits

Fits 2017, 2018, 2019, 2020, 2021, 2022, and 2023 Chevrolet Silverado and GMC Sierra 2500HD & 3500HD models equipped with the 6.6L Duramax diesel engine. Compatible with all cab styles including Regular Cab, Double Cab, and Crew Cab — excluding Cab & Chassis configurations.

The tunes we create for HP Tuner is a custom tunes.

You’ll receive a form to fill out once you place your order. Installation instructions and form instructions will be emailed to you after your purchase.

Our tunes are made in-house by people who have worked with Duramax. We build and support the tuning for your truck ourselves.

Shift on the fly (through the steering wheel):

Lev 1: Stock (0HP Added) Ideal for fuel economy, reliability, towing and daily driving

Lev 2:+50HP Ideal for fuel economy, reliability, towing and daily driving

Lev 3: +100HP Ideal performance

Lev 4: +150HP Ideal for Performance, modifications to truck may be required

Lev 5: +200HP Recommended only for modified trucks.

Important:

This is just what most customers want. If you’re looking for something different, just let us know on the form we send after your order—we’ll make it happen.

For the tune installation, you need a laptop. The laptop must be a PC running Windows with at least Windows 7 or newer. Macintosh and Linux systems are not compatible.

Once you place your order, plug your HP Tuner into your vehicle’s OBD-II port to retrieve your ECU stock file. Then, send us the file, and we’ll tune it and send it back to you. The process is simple, and the entire installation takes about 30 minutes.

Don't panic! We will send you detailed instructions. Plus, if you have any questions or get stuck during the installation, we've got you covered. Don't forget you have unlimited access to our professional tuning technicians.

Transmission tuning is not included in this package, but we do offer it as an add-on. Check out this link to add it to your cart:
https://dieselpatriots.com/products/tcm-tuning-and-unlock-gmc-2017-2023

By deleting your truck, you’ll experience a noticeable boost in horsepower and performance — especially when towing or hauling. Most of our customers report gains of 3–5 MPG, with some seeing improvements of up to 7 MPG. You’ll feel the difference in both power and efficiency from the very first drive.