OBD2 Delete Tuning Package | LM2 Duramax | 2020-2022

This all-in-one LM2 tuning bundle is built for 3.0L Duramax owners who want a proper, OBD-II port flashing solution—without chasing parts or realizing credits are missing at checkout. It’s a streamlined package made specifically for 2020–2022 Silverado and Sierra 1500 trucks running the LM2 engine.

Intended for off-road applications, this setup lets you read your stock file, receive a correctly built delete calibration based on that file, and flash it straight to your ECM through the OBD-II port.

What’s Included

OBD2 Flash Tuning Interface (Hardware)
Plugs into the factory OBD-II port for reading, flashing, and data logging. 

LM2 Delete Tune File (2020–2022 Sierra/Silverado)
A custom calibration created from your original stock file for clean, consistent operation—helping avoid common headaches like fan behavior problems, warning lights, and drivability quirks.

6 Tuning Credits (Included)
Everything required to flash is already included. No extra credit purchases needed.

Tune Levels Available

Pick a single level, or get all available levels together (not SOTF/on-the-fly switching).

• Stock Optimized – +0 HP (factory-like power with smoother drivability)

• Tow – +20 HP (added torque aimed at controlled towing performance)

• Street – +40 HP (stronger acceleration with sharper throttle response)

• All Levels Bundle (includes Stock Optimized, Tow, and Street)

Vehicle Fitment

• Chevrolet Silverado 1500 – 3.0L LM2 Duramax

• GMC Sierra 1500 – 3.0L LM2 Duramax

• Model Years: 2020, 2021, 2022

Benefits & Features

• Flash through the OBD-II port 

• Tune is built from your stock file (vehicle-specific calibration)

• Designed for clean operation without common delete-related glitches

• Better throttle response and improved torque delivery

• Proper torque modeling to support smooth shifting behavior

• Ready to flash immediately with included credits

• Data logging support for diagnostics and performance review
  

  Note: For GM Duramax LM2 applications, the ECM E46 Upgrade & Unlock Service is required - this involves removing your ECM and shipping it to HP Tuners for unlocking. Available through us or directly with HP Tuners. 

Emissions & Legal Use Disclaimer

For off-road use only. Not legal for use on public roads. Always confirm local and federal emissions requirements before purchasing or installing this tuning package.

Complete, No-Guesswork LM2 Tuning

If you’re after a straightforward, professional solution for a 2020–2022 LM2 Duramax, this OBD II Delete Tuning Package combines the interface, custom files, and required credits into one ready-to-use bundle.