GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2008 🢒 Sierra Denali 🢒 Engine 🢒 Engine Controls and Fuel - 6.6L 🢒 Fuel Injection Fuel Return Pipe Replacement - Left Side

Removal Procedure

    Object Number: 1732395 Size: SH
  1. Remove the glow plug control module. Refer to Glow Plug Control Module Replacement .
  2. Remove the fuel injection fuel return pipe clips (1).

    3. Object Number: 1732415 Size: SH
  3. Disconnect the fuel injection fuel return pipe from the fuel injectors.

    4. Object Number: 1872030 Size: SH
  4. Cut the tie strap (1) securing the fuel injection fuel return pipe to the engine wiring harness.
  5. Disconnect the fuel injection fuel return pipe from the fuel return pipe.

    6. Important: Note the routing of the fuel injection fuel return pipe under the engine wiring harness.

  6. Remove the fuel injection fuel return pipe from the engine.

Installation Procedure

    Object Number: 1872030 Size: SH
  1. Position the fuel injection fuel return pipe to the engine. Ensure to route the fuel injection fuel return pipe under the engine wiring harness.
  2. Connect the fuel injection fuel return pipe to the fuel return pipe.
  3. Install a NEW tie strap (1) securing the fuel injection fuel return pipe to the engine wiring harness in the location shown.

    4. Object Number: 1732415 Size: SH
  4. Connect the fuel injection fuel return pipe to the fuel injectors.

    5. Object Number: 1732395 Size: SH
  5. Install the fuel injection fuel return pipe clips (1).
  6. Install the glow plug control module. Refer to Glow Plug Control Module Replacement .
  7. Prime the fuel system. Refer to Fuel System Priming .
  8. Start the engine. If the engine stalls, repeat the above step.
  9. Once the engine starts, inspect for fuel leaks.