2001-2004 LB7 Duramax Tuning Package (Engine + Allison)

Full calibration package for the 2001–2004 LB7 6.6L Duramax paired with the Allison 1000 transmission — the complete solution for drivers who want coordinated engine and drivetrain performance.

What's included

• Custom VIN-matched LB7 engine calibration with multiple switchable power levels
• Allison 1000 transmission calibration with shift pressure, shift point, and torque management tuning
• Datalogging support for ongoing calibration refinement

How it works

Files are delivered via EFI Live FlashScan V2. Your tuner uses your stock file and vehicle data to build a VIN-locked custom calibration. A FlashScan V2 device is required to load tunes onto the ECM and TCM.

Support tiers

• Limited (4 Weeks): Four weeks of revision rounds after initial file delivery; tune remains on your tool after the support window closes.
• Full (Lifetime): Unlimited revisions and lifetime access as your build, fuel, or modifications evolve.

Requires an EFI Live FlashScan V2 device. Not compatible with other flash platforms.

Calibrations are developed for motorsport and off-road use. Verify local regulations before use on public roads.