2004.5-2007 LLY/LBZ Duramax Tuning Package (Engine + Allison)

Complete calibration package for the 2004.5–2007 LLY/LBZ 6.6L Duramax paired with the Allison 1000 — a coordinated engine and transmission tune for the mid-generation classic body style.

What's included

• Custom VIN-matched LLY or LBZ engine calibration with multiple switchable power levels
• Allison 1000 TCM calibration covering shift pressure, shift timing, and torque converter management
• Datalogging support for post-install refinement

How it works

Files are delivered via EFI Live FlashScan V2. Your calibration is built from your stock ECM/TCM files and locked to your VIN. A FlashScan V2 device is required to flash both controllers.

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 build evolves.

Requires an EFI Live FlashScan V2 device. Specify LLY or LBZ at time of order.

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