Fuel Conditioning Module

Fuel Conditioning Module - 6.7L Diesel

Removal and Installation









WARNING: When handling fuel, always observe fuel handling precautions and be prepared in the event of fuel spillage. Spilled fuel may be ignited by hot vehicle components or other ignition sources. Failure to follow these instructions may result in serious personal injury.

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Jacking and Lifting Service and Repair.

2. Release the fuel system pressure. For additional information, refer to Fuel System - General Information - Gasoline and Diesel Fuel System Pressure Release.

3. Disconnect the battery ground cable. For additional information, refer to Battery, Mounting and Cables Battery Disconnect / Connect.

4. Disconnect the water in fuel sensor electrical connector.

5. Disconnect the fuel conditioning module electrical connector.

6. NOTE: There is a check valve in the fuel conditioning module, that will stop the fuel from siphoning out of the tank. It works when the filter cover is loosened 3 full turns or removed.

Depending on the amount of the O-ring seal swelling, removal of the fuel filter cover may be noisy and require some effort.

Loosen the fuel filter cover and unscrew it counterclockwise 3 full turns.
- To install, tighten the filter cover until it contacts the mechanical stops.

7. Loosen the drain plug until the O-ring is showing and drain the fuel into a suitable container.
- Tighten by hand once the fuel has drained.

8. Disconnect both rear fuel return tube-to-fuel conditioning module quick connect coupling and both rear fuel supply tube-to-fuel conditioning module quick connect coupling. For additional information, refer to Fuel System - General Information - Gasoline and Diesel Quick Connect Coupling.

9. Remove the 4 mounting nuts and the fuel conditioning module and bracket as an assembly.
- To install, tighten to 20 Nm (177 lb-in).

10. NOTE: Apply clean engine oil to the O-ring seals prior to installation.

To install, reverse the removal procedure.