GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 Sierra Denali 🢒 Engine 🢒 Engine Controls and Fuel - 4.3L 🢒 Fuel Injector Replacement

Removal Procedure

    Note: The engine oil may be contaminated with fuel if the fuel injectors are leaking.


    Object Number: 1655471 Size: SH
  1. Remove the fuel meter body. Refer to Fuel Meter Body Assembly Replacement.
  2. Remove the injector retainer lock nuts (4) and retainer (3).

    3. Caution: Use care in removing the fuel injectors to prevent damage to the electrical connector terminals.

    The fuel injector is serviced as a complete assembly only.

    Also since the injectors are electrical components, these injectors should not be immersed in any type of liquid solvent or cleaner as damage may occur. Fuel injector cleaning is not recommended.

  3. While pulling the fuel injector downward, push with a small tip punch down between the injector terminals until the injector is removed.

Installation Procedure

    Object Number: 1655471 Size: SH

    Note: When ordering new fuel injectors, be sure to order the correct injector for the application being serviced.

  1. Lubricate the NEW injector O-ring seals with clean engine oil.

    2. Caution: Refer to Fastener Caution in the Preface section.

  2. Install the fuel injector (2) into the fuel meter body injector socket.
  3. Install the injector retainer (3) and the injector retainer lock nuts (4).

    4. Tighten
    Tighten the nuts to 3 N·m (27 lb in).

  4. Install the fuel meter body. Refer to Fuel Meter Body Assembly Replacement.