GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2006 🢒 Envoy - 4WD 🢒 Engine 🢒 Engine Controls - 5.3L 🢒 Fuel Injection Fuel Rail Crossover Tube Replacement

Removal Procedure
  1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .

    2. Object Number: 1485985 Size: SH
  2. Remove the fuel rail crossover pipe retaining clip screws (1) and retainer clips (2).
  3. Remove the crossover pipe (3) from the left and right hand fuel rails.
  4. Remove and discard the crossover fuel pipe O-rings (4).

Installation Procedure

    Object Number: 1485985 Size: SH
  1. Lubricate the NEW fuel rail crossover pipe O-rings (4) with clean engine oil.
  2. Install the NEW fuel rail crossover pipe O-rings (4) onto the crossover pipe (3).
  3. Install the fuel rail crossover pipe (3) to the left and right hand fuel rails.
  4. Install the fuel rail crossover pipe retainer clips (2).

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

    Important: When installing the retaining clip screws for the fuel rail crossover pipe, always start the screws by hand. This will prevent stripping of the threads on the rail.

  5. Install the fuel rail retainer clip screws (1).

    6. Tighten
    Tighten the screws to 3.8 N·m (34 lb in).

  6. Install the fuel fill cap.
  7. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  8. Use the following procedure in order to inspect for leaks:
    9. 8.1. Turn the ignition ON, with the engine OFF, for 2 seconds.
    8.2. Turn OFF the ignition OFF for 10 seconds.
    8.3. Turn ON the ignition ON, with the engine OFF.
    8.4. Inspect for fuel leaks.