3500 4x2 Pickup L6-359 5.9L DSL Turbo (1994)
Water-in-fuel Sensor
3. Disconnect the electrical connector from the WIF sensor at the bottom of the filter.
4. Remove (unscrew) the filter/separator and WIF sensor as one assembly from the filter housing.
Fuel/Water Separator O-Ring
5. Remove the 0-ring seal from the filter housing.
6. Drain the filter/separator.
Water-In-Fuel Sensor
7. Remove the WIF sensor, 0-ring and drain valve assembly from the filter/separator.
8. Inspect the WIF sensor probes. Clean contaminants from sensor probes if necessary. Replace sensor if probes will not clean up.
INSTALLATION
1. Install a new 0-ring seal on WIF sensor.
2. Install WIF sensor/drain valve assembly into new filter/separator.
NOTE: If the new fuel filter/water separator is not filled with clean fuel before it is installed, manual air bleeding of the fuel system may be
