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Diamond T Remanufactured FICM for Chevy/GMC (2004-05) 6.6L Duramax LLY

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SKU: FICM66LLY

Completely overhauled to exceed OEM standards for durability and reliability
Designed for 2004-2005 Chevy/GMC 6.6L Duramax LLY engines
Lifetime repair warranty with 1st year replacement coverage
Handles truck modifications, tunes, and upgrades with confidence
Addresses common LLY FICM failure points
No need for a rebuildable core to receive your core refund
Essential for restoring reliable engine performance
Free programming to the latest calibrations included
Plug-and-play installation for a quick, hassle-free swap
American Made, Because It Matters

Was: $2,499.00

Sale: $2,174.99

Save: 13%

Save: $324.01

Customize Your Item

BTR LLY Injector Harness Upgrade Kit +$112.50

Core Charge: $200.00 I will send cores first

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Description

Ensure the reliable performance of your 2004-2005 Chevy/GMC 6.6L Duramax LLY with the Diamond T Fuel Injection Control Module (FICM). Each unit is completely overhauled and upgraded to exceed OEM standards, making it capable of supporting any truck modifications, performance tunes, or upgrades you have.

Backed by a lifetime repair warranty with 1st year replacement coverage, the Diamond T FICM is built for long-term dependability. Common LLY FICM failure points are fully addressed, making this module an essential upgrade for any Duramax owner looking to eliminate hard starts, stalling, or injector control issues.

Installation is simple with plug-and-play compatibility and free programming to the latest calibrations-no dealer visit required. Plus, Diamond T’s policy of not requiring a rebuildable core for your refund makes the replacement process fast and hassle-free.

Whether you’re replacing a failed FICM or upgrading for peace of mind, the Diamond T FICM is the trusted choice to keep your Duramax LLY running strong. American Made, Because It Matters.