DIESELR MPVI4 E46 Tune Files (2020-2025 Duramax LM2 3.0L)

The DIESELR MPVI4 E46 Tune Files are designed for 2020–2025 Duramax LM2 owners who want smoother throttle control, stable torque delivery, and consistent drivability from the 3.0L platform. These calibrations require an E46 ECM unlock service (sold separately) and six HP Tuners Universal Credits before being applied through the MPVI4 interface.

Each file is built for the LM2’s E46 Global B architecture. Two power levels are available depending on how you use your truck:

• Level 1: +0 HP

• Level 2: +20 HP

Both levels focus on cleaner fueling, predictable throttle feel, and reliable performance during towing or daily driving.

Tune Levels for DIESELR MPVI4 E46 Tune Files

Level 1 (0 HP)

Designed for smooth drivability, highway use, and towing stability.

Level 2 (+20 HP)

Provides a sharper response and stronger low-end pull while maintaining reliability.

Requirements

• E46 ECM unlock service (sold separately)
• 6 HP Tuners Universal Credits (sold separately)
• MPVI4 or compatible HP Tuners interface

These calibrations give the LM2 platform a more refined and consistent driving character without sacrificing long-term durability.