2001-2004 LB7 Duramax Engine Tuning

Custom engine calibration for the 2001–2004 LB7 6.6L Duramax — purpose-built for drivers who want maximum engine output without touching the Allison 1000 TCM calibration.

What's included

• Custom VIN-matched LB7 ECM calibration with multiple switchable power levels
• Fueling, timing, boost, and rail pressure calibration optimized for the LB7 injector system
• Datalogging support for post-install tuning refinement

How it works

Files are delivered via EFI Live FlashScan V2. Your calibration is built from your stock ECM file and locked to your VIN. 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 as your modifications change.

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.