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 fuel side to monitor pressure.

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Upgrade your fuel system with this fuel distribution block from Fleece Performance Engineering. If you have an aftermarket fuel filtration system such as an Air Dog or a FASS and dual CP3 pumps, this fuel block will allow you to get rid of your unnecessary factory fuel filter and give you a convenient and clean location to route your feeds, returns, and sensors. It mounts in the factory fuel filter location to allow you to use your factory return lines without any relocating or bending. It also features a port for the factory WIF (water in fuel) sensor, a 9/16-18 O-ring port (dual CP3 return port), (3) 3/4-16 O-ring ports (feed ports), and (2) 1/8" NPT ports (sensor ports). Kit Includes: Fuel Block Replacement Banjo Washers WIF Sensor Port 9/16-18 O-ring to -6AN male fitting (dual CP3 return port) 9/16-18 O-ring port plug (3) 3/4-16 O-ring to -8AN male fittings (feed ports) 3/4-16 O-ring port plug (2) 1/8" NPT ports (sensor ports) Water in Fuel Sensor Plug (M14x2.0)

This Part Fits:

Upgrade your fuel system with this fuel distribution block from Fleece Performance Engineering. If you have an aftermarket fuel filtration system such as an Air Dog or a FASS and dual CP3 pumps, this fuel block will allow you to get rid of your unnecessary factory fuel filter and give you a convenient and clean location to route your feeds, returns, and sensors. It mounts in the factory fuel filter location to allow you to use your factory return lines without any relocating or bending. It also features a port for the factory WIF (water in fuel) sensor, a 9/16-18 O-ring port (dual CP3 return port), (3) 3/4-16 O-ring ports (feed ports), and (2) 1/8" NPT ports (sensor ports). Kit Includes: Fuel Block Replacement Banjo Washers WIF Sensor Port 9/16-18 O-ring to -6AN male fitting (dual CP3 return port) 9/16-18 O-ring port plug (3) 3/4-16 O-ring to -8AN male fittings (feed ports) 3/4-16 O-ring port plug (2) 1/8" NPT ports (sensor ports) Water in Fuel Sensor Plug (M14x2.0)

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