FICM

Fuel Injection Control Module (FICM) Repair Services

For heavy-duty diesel truck owners, the Fuel Injection Control Module (FICM) is the beating heart of the engine’s performance. It is responsible for stepping up the voltage from the battery to actuate the fuel injectors. Unfortunately, due to its location directly on the engine block, the FICM is subjected to extreme heat and intense vibration, leading to inevitable component degradation.

When the internal capacitors and solder joints fail, the voltage output drops drastically. Symptoms of a failing FICM include hard cold-starts, rough idling, severe loss of power, engine misfires, and thick smoke from the exhaust. Dealerships typically mandate a complete module replacement, which can cost well over a thousand dollars.

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Professional Component-Level FICM Rebuilds

At SpeedoFix, our FICM repair service focuses on permanently upgrading the weak links in the factory circuitry. We completely disassemble the module, resolder the critical connections, and replace failing components with heavy-duty, high-temperature alternatives.

  • GM 6.6L LLY Duramax: We provide specialized rebuild services for the 2004.5-2005 Chevy Silverado and GMC Sierra HD trucks, resolving internal circuitry failures that cause random shut-offs and no-start conditions.
  • Retain Factory Programming: By repairing your original factory module, your truck retains all its native software, VIN data, and specific tuning. There is absolutely no need for a dealership visit or “flash” after the repair.
  • Guaranteed Voltage Output: Every rebuilt module is bench-tested under load to ensure it delivers the precise, stable voltage your diesel injectors require to fire correctly.

Explore our FICM rebuild services below to restore the reliability and towing power of your diesel truck.