DIESELR MPVi4 E46 Tune Files (2020-2025 Duramax LM2 3.0L)The DIESELR MPVI4 E46 Tune Files are designed for 20202025 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 LM2s E46 Global B architecture. Two power levels are available depending on how
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