GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2007 🢒 TopKick C-Series (Conventional) C6/C7/C8 🢒 Engine 🢒 Engine Controls and Fuel - 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. Clean any dirt from the fuel pressure dampener retainer and the surrounding area.
  3. Remove the fuel pressure dampener clip (1) and dampener.

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

    5. Object Number: 1247857 Size: SH
  5. 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 fuel fill cap.
  6. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection.
  7. Use the following procedure to inspect for leaks:
    8. 7.1. Turn the ignition ON, with the engine OFF, for 2 seconds.
    7.2. Turn the ignition OFF for 10 seconds.
    7.3. Turn the ignition ON, with the engine OFF.
    7.4. Inspect for fuel leaks.