GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2001 🢒 Yukon XL - 4WD 🢒 Engine 🢒 Engine Controls - 4.8L, 5.3L, and 6.0L 🢒 Fuel Injection Fuel Rail Crossover Tube Replacement

Removal Procedure
  1. Remove the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement in Engine Mechanical.

    2. Object Number: 300360 Size: SH
  2. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .
  3. Disconnect the fuel feed pipe (1) and the fuel return pipe (2) from the fuel rail.

    4. Object Number: 350543 Size: SH
  4. Remove the fuel return pipe attaching screw (3) and the fuel return pipe retainer (2).
  5. Remove the fuel return pipe (1).
  6. Remove the fuel return pipe O-ring (6).
  7. Remove the fuel pressure connection core assembly (24) from the crossover pipe (25).
  8. Remove the retainer clip attaching screw (22) and the crossover fuel pipe to the right fuel rail retainer clip (21).
  9. Remove the retainer clip attaching screw (4) and the crossover fuel pipe to the left fuel rail retainer clip (5).
  10. Remove the crossover pipe (25) from the left fuel rail (14) and the right fuel rail (15).
  11. Remove the crossover fuel pipe O-rings (7, 20).
  12. Discard the O-rings (6, 7, 20).

Installation Procedure

    Object Number: 350543 Size: SH
  1. Lubricate the new crossover fuel pipe O-rings (7, 20) with clean engine oil.
  2. Install the crossover fuel pipe O-rings (7, 20) on the crossover pipe (25).
  3. Install the crossover pipe (25) to the left fuel rail (14) and the right fuel rail (15).

    4. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  4. Install the crossover fuel pipe to the right fuel rail retainer clip (21). Loosely install the retainer clip attaching screw (22).
  5. Lubricate the new fuel return pipe O-ring (6) with clean engine oil.
  6. Install the fuel return pipe O-ring (6) on the fuel return pipe (1).
  7. Install the fuel return pipe (1) to the left fuel rail (14).
  8. Install the fuel return pipe retainer (2). Loosely install the fuel return pipe attaching screw (3).
  9. Install the crossover fuel pipe to left fuel rail retainer clip (5). Loosely install the retainer clip attaching screw (4).

    10. Tighten

    1. Tighten the crossover fuel pipe retainer clip attaching screws to 3.8 N·m (34 lb in).
    2. Tighten the fuel return pipe attaching screw to 5 N·m (44 lb in).
  10. Install the fuel pressure connection core assembly (24) to the crossover pipe (25).

    11. Object Number: 300360 Size: SH
  11. Connect the fuel return pipe (2) and the fuel feed pipe (1) to the fuel rail.
  12. Tighten the fuel filler cap.
  13. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  14. Use the following procedure in order to inspect for leaks:
    15. 14.1. Turn ON the ignition, with the engine OFF, for 2 seconds.
    14.2. Turn OFF the ignition for 10 seconds.
    14.3. Turn ON the ignition, with the engine OFF.
    14.4. Inspect for fuel leaks.
  15. Install the fuel pressure connection cap.
  16. Install the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement in Engine Mechanical.