Custom tune files for the 6.6L Duramax-powered Chevrolet Silverado and GMC Sierra 2500HD and 3500HD. From the LB7 to the L5P, we build calibrations for towing torque, throttle response, and dependable power.
Supported Trucks
- Chevrolet Silverado 2500HD / 3500HD — 2001–2025
- GMC Sierra 2500HD / 3500HD — 2001–2025
- Engine: 6.6L Duramax turbodiesel
Duramax Engine Generations We Support
- LB7 — 2001–2004
- LLY — 2004.5–2005
- LBZ — 2006–2007
- LMM — 2007.5–2010
- LML — 2011–2016
- L5P — 2017–2025
What a Custom Tune Delivers
- More power & torque matched to your engine generation and mods.
- Sharper throttle response and smoother drivability.
- Allison transmission tuning for firmer, better-timed shifts. [Confirm what you offer.]
- Tune levels for every goal [list your stages/options].
Not sure which engine code or file you need? Contact us with your year and mods.
Tunes are intended for off-road/competition use where applicable — see our Terms & Disclaimer.
[Link this page to your Duramax products/collection once built.]