GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2005 🢒 GMC C Sierra - 2WD 🢒 Engine 🢒 Engine Controls - 6.6L (LLY) 🢒 Fuel Filter Assembly Replacement

Removal Procedure

    Object Number: 1334872 Size: SH
  1. Drain the fuel from the fuel filter. Refer to Water-in-Fuel Draining .
  2. Reposition the fuel hose clamps.
  3. Remove the fuel hoses.

    4. Object Number: 1334874 Size: SH
  4. Disconnect the fuel filter electrical connectors.

    5. Object Number: 1334875 Size: SH
  5. Remove the fuel filter bracket bolts.

    6. Object Number: 1334878 Size: SH
  6. Remove the fuel filter assembly.
  7. Remove the fuel filter bracket bolts and bracket from the fuel filter/heater element housing.
  8. Remove the fuel filter from the fuel filter/heater element housing.
  9. Inspect the fuel filter, replace if necessary.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1334878 Size: SH
  1. Install the fuel filter to the fuel filter/heater element housing.
  2. Install the fuel filter bracket and bolts to the fuel filter/heater element housing.

    3. Tighten
    Tighten the bolts to 20 N·m (15 lb ft).

  3. Install the fuel filter assembly.

    4. Object Number: 1334875 Size: SH
  4. Install the fuel filter bracket bolts.

    5. Tighten
    Tighten the bolts to 20 N·m (15 lb ft).


    Object Number: 1334874 Size: SH
  5. Connect the fuel filter electrical connectors.

    6. Object Number: 1334872 Size: SH
  6. Install the fuel hoses.
  7. Position the fuel hose clamps.
  8. Prime the fuel system. Refer to Fuel System Priming .
  9. Start the engine. If the engine stalls, repeat the above step.
  10. Once the engine starts, inspect for fuel leaks.