Duramax LM2 Tuning (2020–2022)

Duramax LM2 Tuning (2020–2022)

The LM2 is GM's 3.0L inline-6 Duramax diesel, introduced in the 1500-series trucks as a refined, fuel-efficient alternative to the big-block V8 options. Don't let the displacement fool you — the LM2 is a capable, modern diesel platform that responds well to ECM tuning for improved power, torque, and real-world drivability.

ECM Tuning

LM2 ECM tuning optimizes fueling, boost, and torque management to unlock the engine's full capability while maintaining the smooth, refined character the platform is known for.

  • Fueling and timing optimization
  • Turbo boost and response tuning
  • Torque management removal
  • Power, tow, and economy calibrations available
  • Supports stock and modified builds

Supported Platforms

  • HP Tuners — Full ECM read/write for LM2 applications
  • EZ Lynk AutoAgent — Cloud-based remote tune delivery

Ready to tune your LM2? Contact us to discuss your build and get the right calibration for your truck.