Restore OE power, fuel economy, and emission system control to your 2004.5–2005 6.6L Duramax LLY with the GM Genuine ACDelco ECM, a brand new, not remanufactured engine computer. Precisely engineered for drop-in fit and seamless signal integrity, this ECM manages your fuel, ignition, turbo, and emissions systems for ideal performance and reliability. It comes ready with VIN-matched programming to your application, as required on all GM powertrains.
GM Genuine ECMs are tested and validated to GM's strict OE standards, ensuring full compatibility with factory sensors, injectors, and monitoring networks—supporting maximum durability for daily work trucks, performance builds, or restoration projects. Perfect for fixing persistent computer trouble codes, crank/no-start, or tuning issues, with the full confidence of GM OE quality.
