GDP MPVI3 Single Support Pack (2020-2025 GM 1500 3.0L LM2 Duramax)

The GDP MPVI4 LM2 Support Pack is built for 2020–2025 GM 1500 owners running the 3.0L Duramax LM2 engine. This support pack provides single-level tuning through the HP Tuners MPVI4 interface and requires an E46 ECM unlock service (sold separately) along with six HP Tuners Universal Credits. Once the ECM is unlocked, the file can be flashed directly through the MPVI4 for cleaner throttle control and more consistent drivability.

Two power levels are available for the LM2 platform:

• Level 1: +0 HP

• Level 2: +20 HP

Both calibrations are developed specifically for the E46 Global B ECM used in the 2020–2025 LM2 engine. Level 1 offers a steady, refined driving feel. Level 2 provides a stronger low-end pull and quicker response while staying reliable for long-term use.

Tune Levels in the GDP MPVI4 LM2 Support Pack

Level 1 (0 HP)

Built for steady drivability, towing manners, and predictable throttle behavior.

Level 2 (+20 HP)

Gives the LM2 a sharper response and more usable torque without compromising stability.

Requirements

• Unlocked E46 ECM (sold separately)
• 6 HP Tuners Universal Credits (sold separately)
• HP Tuners MPVI4 interface

These calibrations give the 3.0L LM2 platform a cleaner, more controlled driving feel while maintaining the reliability GM 1500 owners expect.