Fuel Injection Control Module (FICM) LLY Duramax Repair Service

Expert 6.6L Duramax LLY FICM Repair Service

Welcome to our professional lly ficm 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 is likely failing. Customers often ask us, what is a ficm on a duramax? Mounted directly on the engine, this highly specialized computer is responsible for stepping up the voltage to fire your diesel fuel injectors at precisely the right millisecond. Because of its location, the FICM is constantly exposed to extreme heat and heavy vibrations, eventually causing its internal circuitry to completely break down.

Fixing the Duramax Fuel Injection Module

Unlike a standard engine computer, the duramax ficm handles immense internal voltage. When its 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 provides a permanent and highly cost-effective solution.

With our ficm 6.6 duramax rebuild service, we open your original module, repair the damaged circuitry, and upgrade the weakest factory points with heavy-duty components designed to outlast OEM specifications. Because we are rebuilding your exact original module, it remains fully synchronized with your engine’s immobilizer. Once you receive the repaired unit in the mail, it is perfectly Plug-and-Play when you bolt it back on!

Common Drivability Symptoms We Fix

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

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

Supported Vehicles & Part Numbers

This repair strictly applies to 2004.5 and 2005 Chevrolet Silverado and GMC Sierra 2500HD/3500HD trucks equipped with the 6.6L LLY Duramax diesel engine. We service a variety of compatible OEM part numbers, including:

0281011134 | 97303751 | 8973037511 | 8973037513

*(Note: If you prefer to replace your unit entirely, you can purchase a brand-new OEM module HERE).*

Shipping & Contact

To safely utilize this service, carefully remove the module from your engine, package it securely with plenty of bubble wrap, and ship it to our facility.

Ready to get your Duramax reliably back on the road? Contact us today for more details on your repair. For secure mail-in shipping across the country, we highly recommend using USPS or FedEx.

Critical Note: We DO NOT repair water-damaged modules. Additionally, if your module emits a heavy burnt electrical smell, its internal board may be destroyed beyond repair. Unrepairable modules will be returned to you with a refund, minus a $100 diagnostic fee and return shipping costs. You may need an OBD2 scanner to clear old DTCs from your engine computer’s memory after installation.