Restore your Duramax performance with a professional FICM Repair Service designed specifically for 2001–2005 Chevy and GMC 6.6L Duramax trucks. If your truck is showing symptoms like long crank, rough idle, injector voltage issues, or the notorious FICM trouble codes, this service brings your original module back to full working condition without the cost of dealership replacement. Our repair process replaces failed high-load components inside the Fuel Injection Control Module, restoring proper injector drive voltage and improving cold-start behavior, throttle response, and overall drivability.

The FICM on a 6.6 Duramax is responsible for delivering precise voltage to the injectors. When the internal circuitry starts to fail, the truck becomes increasingly difficult to start, idles poorly when cold, loses power under load, or may not start at all. Many owners notice the first signs during cold weather, after a weak battery incident, or following long-term heat exposure. Instead of replacing the entire module, our Duramax FICM repair service provides a cost-effective, long-lasting solution that restores reliability and prevents further injector strain.

Common Symptoms of a Failing Duramax FICM

• Hard starting when the engine is cold
• Long crank or complete no-start condition
• Rough idle that smooths out as the engine warms
• Loss of power, hesitation, or stumbling under acceleration
• Check Engine Light / DTCs such as P0611 (FICM Performance)
• Random misfires or intermittent injector circuit codes

These symptoms are extremely common on early Duramax trucks due to factory FICM design limitations. Our repair replaces the components that typically fail, ensuring a more durable and heat-resistant module that maintains consistent voltage output.

What This FICM Repair Service Includes

• Comprehensive inspection of the FICM board and injector driver circuits
• Replacement of failed or weak internal components using upgraded parts
• Reflow and reinforcement of high-stress solder points
• Final testing under operating load to verify proper voltage output
• No programming required — reinstall and start your truck
• Fast turnaround (2–3 business days)
• 4-month warranty on the repair

Once repaired, your FICM can deliver stable injector voltage again, improving consistency in fuel delivery and ignition timing. Many customers report easier cold starts, smoother idle, and better throttle response immediately after reinstalling their module.

Compatible Duramax Models

This service is compatible with all 2001–2005 6.6L Duramax engines, including:

• 2001 Chevrolet Silverado 2500HD / 3500
• 2002 Chevrolet Silverado 2500HD / 3500
• 2003 Chevrolet Silverado 2500HD / 3500
• 2004 Chevrolet Silverado 2500HD / 3500
• 2005 Chevrolet Silverado 2500HD / 3500
• 2001–2005 GMC Sierra 2500HD / 3500

Supported Part Numbers

• 97303751
• 8973037510
• 12210729
• 810-1051
• Other compatible Duramax FICM part numbers may apply

Why Repair Instead of Replace?

Dealership pricing for a replacement Duramax FICM is extremely high, often requiring reprogramming, additional labor, and downtime. Our repair service keeps your truck’s original module and avoids unnecessary coding. Reusing the original FICM helps preserve compatibility with the ECM and injector trim values while saving hundreds of dollars. For most truck owners, a professional repair is all that’s needed to restore full performance.

Recommended Additional Maintenance

If your truck still has the original batteries or alternator, weak voltage supply can accelerate FICM wear. We recommend testing your charging system and replacing any weak components. Keeping clean electrical grounds on the engine and frame also helps ensure long-term module stability.

Turnaround & Shipping

Once your module arrives, we complete the repair within 2–3 business days. We return the module ready to install — no reprogramming, reflashing, or injector relearn required. Simply plug in your restored FICM and start the engine.

Service Guarantee

Your repair is protected by a 4-month warranty covering components replaced during the service. If a problem reappears within the warranty period, we’ll reservice the module at no additional cost.

Restore your Duramax the right way — with a proven FICM repair service designed to save money, reduce downtime, and keep your 6.6 Powerstroke performing at its best.

Please ship your module to the following address:

Module Repair Lab
8698 Elk Grove Blvd Ste 1, Elk Grove, CA 95624

Make sure to include your contact information and order number inside the package to help us process your repair quickly.

We recommend using a trackable and insured shipping method to ensure safe delivery. Once your repair is complete, we will ship it back to the return address you provide.

If you have any questions, feel free to contact us.

Warranty coverage varies depending on the specific product being repaired. Please refer to the individual product page for the most up-to-date warranty information.

In general, our warranty covers the repaired part for a defined period beginning on the date of repair. If a malfunction occurs within the warranty period, we will repair the item at no additional cost. In rare cases where the item is deemed irreparable, we reserve the right to either replace the circuit board or refund the cost of repair, at our discretion.

This warranty is non-transferable and applies only to the original purchaser. Damage resulting from misuse, accidents, improper installation, or unauthorized repairs is not covered and will void the warranty.

If you have any questions regarding the warranty for your specific repair, please contact us directly.