GDP MPVI4 E66 (Global B) Tune Files (2021-2025 Duramax LM2 3.0L)

GDP MPVI4 E66 (Global B) Tune Files (2021–2026 Duramax LM2 3.0L)

The GDP MPVI4 E66 (Global B) Tune Files are designed specifically for the 2021–2026 3.0L Duramax LM2 engine. These calibrations work with the newer E66 ECM found in GM’s Global B platform and require an ECM unlock service before tuning can begin. Once unlocked, the files are applied using the MPVI4 interface and six HP Tuners Universal Credits.

This file package provides two selectable levels built for everyday drivability and steady response:

• Level 1: 0 HP
• Level 2: +20 HP

Both options are designed for LM2 owners who want cleaner throttle control and more consistent torque without altering factory behavior outside the ECM’s supported range.

Requirements

• E66 ECM unlock service (sold separately)
• 6 HP Tuners Universal Credits (sold separately)
• MPVI4 or compatible HP Tuners interface

Supported Platforms (E66 Global B)

These tune files apply to LM2-powered vehicles equipped with the E66 ECM, including:

• 2022–2026 Chevrolet Silverado 1500 3.0L LM2
• 2022–2026 GMC Sierra 1500 3.0L LM2
• 2021–2026 Chevrolet Suburban 3.0L LM2
• 2021–2026 Chevrolet Tahoe 3.0L LM2
• 2021–2026 GMC Yukon 3.0L LM2
• 2022.5–2026 Cadillac Escalade 3.0L LZO

What’s Included

• GDP tune files for the E66 Global B ECM
• Level 1 and Level 2 calibration options
• File delivery through the HP Tuners MPVI4 platform

These GDP MPVI4 E66 (Global B) Tune Files give LM2 owners a clean calibration path for the modern Global B control system. With the proper unlock and credits, the LM2 responds smoothly and consistently with either power level applied.