04-05 GM 6.6L LLY Duramax Diamond T NEW FICM Fuel Injection Control Module

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.

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.

• Brand new – not remanufactured – for maximum reliability
• Made in the USA with premium components
• Upgraded design for superior durability and performance
• Lifetime warranty for complete peace of mind
• Engineered specifically for 2004-2005 Chevy/GMC 6.6L Duramax LLY engines
• Handles performance tunes, modifications, and heavy-duty use
• Plug-and-play installation – no programming required
• Eliminates common LLY FICM failures and electrical issues
• Essential upgrade for reliable starting, smooth operation, and long-term performance
• American Made, Because It Matters

Diamond T: FICM66LLY-NEW