Fuel Injection Control Module (FICM) Duramax LLY 6.6L

If your 2004.5-2005 Chevrolet Silverado or GMC Sierra 2500HD/3500HD is suffering from severe injector misfires, rough idling, or a complete crank/no-start condition, a failed Fuel Injection Control Module is usually the culprit. Because these modules are mounted directly on the engine, years of extreme heat and vibration destroy the internal circuitry. Buying a used module from a junkyard is incredibly risky, as it will likely fail the exact same way. Our brand-new ficm duramax lly replacement is the ultimate, long-lasting solution.

Brand New 2025 Production Technology

This is not a simple board-level repair. This Duramax LLY FICM features a brand-new printed circuit board (PCB) manufactured in 2025 in the USA, built using 100% genuine Bosch components. We take this completely new internal circuitry and professionally seal it inside an authentic OEM core enclosure. This guarantees you receive a reliable, modern, and heavy-duty 6.6 duramax ficm replacement without the astronomical dealership markup.

Because it utilizes an authentic OEM enclosure and genuine Bosch architecture, it perfectly synchronizes with your truck’s ECM. It is 100% plug-and-play right out of the box—no dealer programming or calibration is required to get your truck back on the road!

Key Features & Benefits

• 100% New Internals: Brand new USA-made PCB—not a refurbished or patched board.
• Genuine Parts: Built using authentic Bosch components for maximum longevity.
• Plug-and-Play: Fully compatible with stock and modified 2004.5–2005 6.6L Duramax LLY engines.
• Restores Performance: Resolves common LLY no-start conditions, injector driver codes, and communication failures.
• Full 1-Year Warranty: Drive with peace of mind.

How the $200 Core Refund Works

We want to help keep your truck on the road now while saving you money. Purchase this replacement FICM today and install it. Once your truck is running, simply place your old, malfunctioned FICM into the same box and mail it back to us within 30 days. Once we receive and inspect your core, we will issue a $200 refund back to your original payment method!

Direct Replacement Part Numbers

This module replaces the following OEM part numbers:
8973037511, 0281011134, 897307511, 897307513, 8973037513.

Looking for a more budget-friendly option? If a brand-new module is outside your current budget, we also offer a professional FICM repair service for your original unit.