The Fuel Pump Control Module (FPCM) is a critical component in GMC Sierra trucks, responsible for regulating the fuel pump's operation. This module ensures proper fuel delivery to the engine, maintaining optimal performance and efficiency.

Common Issues

GMC Sierra owners have reported several problems related to the FPCM:

  • Sudden power loss while driving
  • Engine stalling or failure to start
  • Check engine light illumination
  • Reduced engine performance
  • Fuel pump failure

These issues often stem from a faulty FPCM, which can lead to inadequate fuel pressure or flow.

Diagnosis

Diagnosing FPCM problems typically involves:

  • Scanning for error codes, particularly P069E
  • Checking power and ground connections at the FPCM
  • Testing fuel pressure to ensure proper pump operation
  • Inspecting wiring harnesses for damage or corrosion

Professional diagnostic tools may be required to accurately identify FPCM-related issues.

Replacement

Replacing the FPCM in a GMC Sierra involves:

1. Locating the module, usually near the spare tire or fuel tank

2. Disconnecting the battery to ensure safety

3. Removing the old module by unscrewing mounting bolts

4. Installing the new FPCM and securing it in place

5. Reconnecting electrical connectors and the battery

Important: The new FPCM often requires programming by a dealership or specialized technician to function correctly with the vehicle's systems.

Preventive Measures

To avoid FPCM failures:

  • Maintain clean fuel by using quality gasoline and replacing fuel filters regularly
  • Avoid running on low fuel to prevent pump overheating
  • Address check engine lights promptly to catch issues early
  • Perform regular maintenance as recommended by GMC

Recent Developments

As of January 2025, GMC has acknowledged issues with FPCM failures in certain Sierra models. Some key points:

  • Backorders for replacement parts have been reported
  • Potential recall discussions are ongoing
  • Newer models may have updated FPCM designs to address reliability concerns

Owners experiencing FPCM-related problems should contact their local GMC dealership for the most up-to-date information and assistance.

FAQs About Fuel Pump Control Module GMC Sierra

    • How long does an FPCM typically last?
      With proper maintenance, an FPCM can last the lifetime of the vehicle, but failures have been reported in some models after 5-7 years.
    • Can I replace the FPCM myself?
      While physically possible, it's recommended to have a professional perform the replacement due to the need for specialized tools and programming.
    • Is there a warranty on FPCM replacements?
      GMC typically offers a warranty on replacement parts, but coverage may vary. Check with your dealer for specific warranty information.