Return Fuel Pressure Test Port for 2011-2016 LML Duramax Fleece Performance

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  • $25.49
  • Regular price $29.99

The return fuel pressure test port for the 2011-2016 LML Duramax is designed to aid the technician in troubleshooting return fuel pressure, often necessary when diagnosing CP4 pump failures. When installed in the return fuel system, it allows for a pressure gauge to be connected to the return return fuel side to monitor pressure.


  • 11-16 Silverado/Sierra 2500 HD and 3500 HD
  • LML