2011-2016 LML Duramax Engine Tuning

Custom engine calibration for the 2011–2016 LML 6.6L Duramax — engine-only tuning for the CP4-equipped generation, dialed in for power and fuel efficiency without touching the TCM.

What's included

• Custom VIN-matched LML ECM calibration with multiple switchable power levels
• Fueling, timing, boost, rail pressure, and EGT calibration
• Datalogging support for ongoing calibration refinement

How it works

Files are delivered via EFI Live FlashScan V2. Your calibration is built from your stock ECM file and VIN-locked. A FlashScan V2 device is required to flash the ECM.

Support tiers

• Limited (4 Weeks): Four weeks of revision rounds; tune stays on your tool after the window closes.
• Full (Lifetime): Unlimited revisions and lifetime access.

Requires an EFI Live FlashScan V2 device. Engine tune only — does not include Allison TCM calibration.

All calibrations are developed for emissions-compliant performance and must be used in accordance with applicable local, state, and federal regulations.