Duramax LML Tuning (2011–2016)

Duramax LML Tuning (2011–2016)

The LML brought SCR (selective catalytic reduction) and DEF (diesel exhaust fluid) to the Duramax platform, along with a new CP4 high-pressure fuel pump and improved power output. It's a strong engine that responds very well to tuning — whether you're running full emissions equipment or have deleted your truck for competition or off-road use.

ECM Tuning

LML ECM tuning optimizes fueling, boost, timing, and emissions management to unlock the engine's full capability.

  • Fueling and timing optimization
  • VGT turbo boost and vane control tuning
  • Torque management removal
  • DPF, EGR, DEF, and SCR delete tuning available
  • Power, tow, and economy calibrations available

TCM Tuning

Pair your ECM tune with a matched Allison TCM calibration for improved shift quality, reduced slip, and long-term transmission reliability under high-torque conditions.

  • Shift point and pressure optimization
  • Torque converter lockup tuning
  • Matched to your ECM calibration for seamless drivability

Supported Platforms

  • EFI Live — Full ECM & TCM read/write with DSP5 switch support
  • HP Tuners — Versatile platform for street and performance builds

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