GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Express (CNG) 🢒 Engine 🢒 Engine Controls - 6.0L 🢒 Fuel Injector Replacement

Removal Procedure
  1. Remove the fuel rail assembly. Refer to Fuel Injection Fuel Rail Assembly Replacement .

    2. Object Number: 926102 Size: SH
  2. Remove the injector (7) retainer bolt and clip (10).
  3. Remove the injector from the fuel rail with a pulling a twisting motion.
  4. Repeat steps 2 and 3 for the remaining fuel injectors.

Installation Procedure

    Object Number: 926102 Size: SH

    Caution: Natural gas is stored under high pressure. If a leak occurs, the high pressure could cause a personal injury. In order to prevent Compressed Natural Gas (CNG) fuel leaks, always replace the CNG fuel system O-rings during service.

    Important: When installing new gasoline fuel injectors on KL6 equipped vehicles, remove and discard the gasoline fuel injector lower seal (O-ring). If the gasoline fuel injector is installed with the lower seal in place, the flow of compressed natural gas (CNG) fuel through the fuel injector retainer (9) will be restricted. Restricted CNG fuel flow through the retainer (9) will result in a cylinder misfire while operating on CNG.

  1. Install the CNG fuel injector (7) into the fuel rail (5) using a new O-ring (6). Lubricate the new O-ring with petroleum jelly.

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

  2. Install the CNG fuel injector retainer bolt and clip (10).

    3. Tighten
    Tighten the retainer bolt to 7 N·m (61 lb in).

  3. Lubricate the new CNG injector tip O-ring (8) with clean engine oil.
  4. Repeat steps 1, 2 and 3 for the remaining CNG fuel injectors.
  5. Install the fuel rail assembly. Refer to Fuel Injection Fuel Rail Assembly Replacement .