GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2004 🢒 Avalanche - 4WD 🢒 Engine 🢒 Engine Controls - 8.1L 🢒 Fuel Pulse Dampener Replacement

Removal Procedure

    Object Number: 1254422 Size: SH
  1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .
  2. Remove the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement .
  3. Clean any dirt from the fuel pressure dampener retainer and the surrounding area.
  4. Remove the fuel pressure dampener clip (1) and dampener.

    5. Object Number: 1247853 Size: SH
  5. Remove the fuel pressure dampener backup ring.

    6. Object Number: 1247857 Size: SH
  6. Remove the fuel pressure dampener O-ring.

Installation Procedure

    Object Number: 1247857 Size: SH
  1. Lubricate the fuel pressure dampener O-ring with clean engine oil.
  2. Install the fuel pressure dampener O-ring.

    3. Object Number: 1247853 Size: SH
  3. Install the fuel pressure dampener backup ring.

    4. Object Number: 1254422 Size: SH
  4. Install the fuel pressure dampener and clip (1).
  5. Install the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement .
  6. Install the fuel fill cap.
  7. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  8. Use the following procedure to inspect for leaks:
    9. 8.1. Turn the ignition ON, with the engine OFF, for 2 seconds.
    8.2. Turn the ignition OFF for 10 seconds.
    8.3. Turn the ignition ON, with the engine OFF.
    8.4. Inspect for fuel leaks.