Fuel Injection Control Module for Chevy/GMC (2004-05) 6.6L Duramax LLY, New

Experience the next level of reliability and performance for your 2004-2005 Chevy/GMC 6.6L Duramax LLY with the Diamond T Brand New Fuel Injection Control Module (FICM). Unlike remanufactured units, this FICM is completely new and built in the USA using upgraded components and advanced engineering, making it the most dependable option on the market. Because this is a brand new unit, there’s no core charge and no need to return your old FICM—making installation and purchase completely hassle-free.

Designed to eliminate the common electrical failures and injector control issues found in original LLY FICMs, this upgraded module is built to handle performance tunes, truck modifications, and the demands of heavy-duty use. With plug-and-play installation, you can quickly restore or upgrade your Duramax without the hassle of programming or core returns.

Every Diamond T new FICM is backed by a lifetime warranty, so you can drive with confidence knowing your investment is protected for the life of your truck. Choose American-made quality and superior engineering with Diamond T – American Made, Because It Matters.