GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2008 🢒 Sierra - 2WD 🢒 Engine 🢒 Engine Controls and Fuel - 6.6L 🢒 Water in Fuel Indicator Sensor Replacement

Removal Procedure

    Object Number: 1871899 Size: SH
  1. Drain the fuel from the fuel filter. Refer to Water-in-Fuel Draining .
  2. Remove the right front wheelhouse liner rear bolts/retainers as required to reposition the rear half of the wheelhouse liner (1) in order to access the water in fuel sensor.

    3. Object Number: 1871640 Size: SH
  3. Disconnect the water in fuel sensor wiring pigtail (2) from the engine wiring harness electrical connector.

    4. Object Number: 1871744 Size: SH
  4. Remove the water in fuel sensor (1) from the fuel filter.

Installation Procedure

    Object Number: 1871744 Size: SH
  1. Install the water in fuel sensor (1) to the fuel filter, and tighten ½ turn after the seal contacts the filter.

    2. Object Number: 1871640 Size: SH
  2. Connect the water in fuel sensor wiring pigtail (2) to the engine wiring harness electrical connector.

    3. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1871899 Size: SH
  3. Position the rear half of the wheelhouse liner (1) and install the rear bolts/retainers as required.

    4. Tighten
    Tighten the bolts, if required to 2.5 N·m (22 lb in).

  4. Prime the fuel system. Refer to Fuel System Priming .
  5. Start the engine. If the engine stalls, repeat the above step.
  6. Once the engine starts, inspect for fuel leaks.