
- Essential Diagnostic Aid: Designed to provide technicians with a reliable method for monitoring return fuel pressure, a key indicator in the health of your LML Duramax's fuel system.
- Targeted CP4 Pump Diagnosis: Directly assists in the identification and troubleshooting of CP4 pump failures, a frequent concern for 2011-2016 LML Duramax owners.
- Seamless Integration: Engineered for easy installation within the existing fuel return system, ensuring a secure and accurate connection for your fuel pressure tester.
- Professional Precision: Allows for a pressure gauge to be connected directly to the return fuel side, providing precise and actionable data for informed repair decisions.

When troubleshooting the intricate fuel system of your 2011-2016 LML Duramax, precise diagnostics are paramount. The Fleece FPE-FPTP-GM-1116 Return Fuel Pressure Test Port is an indispensable tool, specifically engineered to empower technicians with accurate insights into return fuel pressure. This often-overlooked metric is critically important when diagnosing the common—and often perplexing—CP4 pump failures. By providing a dedicated point of access for a pressure gauge within the return fuel system, this test port transforms a complex diagnostic challenge into a straightforward procedure, saving valuable time and ensuring a more effective repair.
Essential Diagnostic Aid: Designed to provide technicians with a reliable method for monitoring return fuel pressure, a key indicator in the health of your LML Duramax's fuel system.
Targeted CP4 Pump Diagnosis: Directly assists in the identification and troubleshooting of CP4 pump failures, a frequent concern for 2011-2016 LML Duramax owners.
Seamless Integration: Engineered for easy installation within the existing fuel return system, ensuring a secure and accurate connection for your fuel pressure tester.
Prof[...]
- Essential Diagnostic Aid: Designed to provide technicians with a reliable method for monitoring return fuel pressure, a key indicator in the health of your LML Duramax's fuel system.
- Targeted CP4 Pump Diagnosis: Directly assists in the identification and troubleshooting of CP4 pump failures, a frequent concern for 2011-2016 LML Duramax owners.
- Seamless Integration: Engineered for easy installation within the existing fuel return system, ensuring a secure and accurate connection for your fuel pressure tester.
- Professional Precision: Allows for a pressure gauge to be connected directly to the return fuel side, providing precise and actionable data for informed repair decisions.