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Home › Chevrolet › 2005 › Cutaway 4.8 V › Repair and Diagnosis › Engine Performance › System › Engine Control System - 4.8L, 5.3L, And 6.0L - Introduction › Repair Instructions › Fuel Rail Crossover Pipe Replacement › Removal Procedure

Removal Procedure

IMPORTANT: The fuel rail for the 5.3L regular production option (RPO) L59 (VIN Z) is compatible with fuel that has a composition of up to 85 percent Ethanol (E85). Because of this, the fuel rail will be serviced as an entire assembly, that includes both the left and right rail assemblies and the crossover pipe rail.
    Fig 1: View Of Rear Of Engine Fuel Pipe Connections
    GM300360Courtesy of GENERAL MOTORS CORP.
  1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure .
  2. Disconnect the fuel feed (1) and the fuel return (2) pipes from the fuel rail.
    3. Fig 2: Exploded View Of Fuel Rails & Injector Components
    GM350543Courtesy of GENERAL MOTORS CORP.
  3. Remove the fuel return pipe attaching screw (3) and the fuel return pipe retainer (2).
  4. Remove the fuel return pipe (1).
  5. Remove and discard the fuel return pipe O-ring (6).
  6. Remove the fuel pressure connection core assembly (24) from the crossover pipe rail (25).
  7. Remove the retaining clip attaching screw (22) and the crossover fuel pipe retainer clip (21).
  8. Remove the retaining clip attaching screw (4) and the crossover fuel pipe retainer clip (5).
  9. Remove the crossover pipe rail assembly (25) from the left hand rail assembly (14) and the right hand rail assembly (15).
  10. Remove and discard the crossover fuel pipe O-rings (7, 20).
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