Restore and upgrade the performance of your 2007.5–2010 Chevy/GMC 6.6L Duramax LMM with the Diamond T ECM, the American-built engine control solution trusted for reliability and upgrades. Each ECM is professionally rebuilt, thoroughly tested, and enhanced to exceed factory standards, supporting both stock and custom-tuned trucks for towing or high-power setups.
Enjoy free programming to the latest GM calibrations and fast plug-and-play installation—no dealer setup required. Every Diamond T ECM comes with a lifetime warranty and the assurance of precision-tested electronics manufactured in the USA.
Diamond T ECMs are designed for owners who expect more: performance, reliability, and American-made quality—because it matters.
