Fuel Injection Control Module (FICM) LLY Duramax Repair Service

If your 2004.5-2005 GM 6.6L LLY Duramax diesel is suffering from a sudden crank/no-start condition, rough idling, or consistent injector misfires, your Fuel Injection Control Module (FICM) is likely failing. Mounted directly on the engine, the LLY FICM is constantly exposed to extreme heat and heavy vibrations, eventually causing its internal circuitry to break down. Our ficm duramax lly repair service provides a permanent and cost-effective solution.

Understanding the 6.6L Duramax LLY FICM Failure

Unlike a standard engine computer, the FICM is specifically responsible for stepping up the voltage to fire your diesel fuel injectors at precisely the right moment. When the internal components fail, the module cannot deliver the necessary power, resulting in a dead cylinder or a complete engine shutdown.

Instead of spending thousands of dollars on a brand-new module from the dealership, our rebuild service completely overhauls your original unit. We open the module, repair the damaged circuitry, and upgrade the weakest points with heavy-duty components. Because we are rebuilding your exact module, it remains fully synchronized with your engine’s immobilizer—meaning it is perfectly plug-and-play when you bolt it back on!

Common Drivability Symptoms We Fix

If your truck is experiencing any of the following issues, it is a prime candidate for our repair service:

• Crank, No Start: The engine turns over but completely refuses to fire.
• Injector Circuit Codes: Persistent diagnostic trouble codes (DTCs) related to injector or coil failures.
• Rough Running: Severe misfires, stalling, or hesitation during acceleration.

Supported Vehicles & Part Numbers

This repair applies to 2004.5 and 2005 Chevrolet Silverado and GMC Sierra 2500HD/3500HD trucks equipped with the 6.6L LLY Duramax engine. Compatible OEM part numbers include:
0281011134, 97303751, 8973037511, 8973037513.
*(If you need a brand-new OEM module instead of a repair, you can purchase one HERE).*

Important Service Terms

After receiving and installing your repaired module, you may need to use an OBD2 scanner to clear the old DTCs from your engine computer’s memory.
Critical Note: We DO NOT repair water-damaged modules. Additionally, if your module has a heavy burnt electrical smell, it may be beyond repair. Unrepairable modules will be returned to you with a refund, minus a $90 diagnostic fee and return shipping costs.