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

Removal Procedure

    Object Number: 1732395 Size: SH
  1. Remove the fuel filter and bracket. Refer to Fuel Filter Assembly Replacement .
  2. Remove the intake air heater. Refer to Intake Air Heater Replacement .
  3. Remove the fuel injection fuel return pipe clips (1).

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

    5. Object Number: 1872059 Size: SH
  5. Disconnect the fuel injection fuel return pipe from the fuel injection fuel feed manifold.

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

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

Installation Procedure

    Object Number: 1872059 Size: SH
  1. Position the fuel injection fuel return pipe to the engine. Ensure to route the fuel injection fuel return pipe under/behind the engine wiring harness.
  2. Connect the fuel injection fuel return pipe to the fuel injection fuel feed manifold.

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

    4. Object Number: 1732395 Size: SH
  4. Install the fuel injection fuel return pipe clips (1).
  5. Install the intake air heater. Refer to Intake Air Heater Replacement .
  6. Install the fuel filter and bracket. Refer to Fuel Filter Assembly 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.