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Home >> Chevrolet >> 2003 >> SSR LS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 5.3L - Introduction >> Repair Instructions >> Fuel Rail Assembly Replacement >> Removal Procedure
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Removal Procedure

    IMPORTANT: An 8-digit identification number (1) is located on the fuel rail assembly. Refer to this model identification number if servicing or part replacement is required.
    Fig 1: Fuel Rail Identification Number Location
    GM380659Courtesy of GENERAL MOTORS CORP.
  1. Remove the engine sight shield. Refer to Engine Sight Shield Replacement in Engine Mechanical.
  2. Before removal, clean the fuel rail assembly with a spray type engine cleaner, GM X-30A or equivalent, if necessary. Follow the package instructions. Do not soak fuel rails in liquid cleaning solvent.
    3. Fig 2: Locating Accelerator Control Cable and Cruise Control Cable
    GM389853Courtesy of GENERAL MOTORS CORP.
  3. Disconnect the accelerator control cable and the cruise control cable from the cable bracket.
    4. Fig 3: View Of Accelerator/Throttle Cable
    GM389031Courtesy of GENERAL MOTORS CORP.
  4. Disconnect the accelerator control cable and the cruise control cable from the throttle body.
    5. Fig 4: View Of Upper Engine Wire Harness
    GM310125Courtesy of GENERAL MOTORS CORP.
  5. Remove the upper engine wire harness retainer nut.
  6. Disconnect the evaporative emission (EVAP) purge valve harness connector.
  7. Reposition the upper engine wire harness aside.
  8. Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure .
    9. Fig 5: Identifying Lock Release
    GM372749Courtesy of GENERAL MOTORS CORP.
  9. Identify the connectors to their corresponding injectors to ensure correct sequential injector firing order after reassembly.
  10. Pull the top portion (2) of the injector connector up. Do not pull the top portion of the connector past the top of the white portion (1).
    11. Fig 6: Disconnecting Fuel Injector Electrical Connectors
    GM372753Courtesy of GENERAL MOTORS CORP.
  11. Push the tab (1) on the lower side of the injector connector in order to release the connector from the injector.
  12. Repeat step 10 and step 11 for each injector connector.
    13. Fig 7: View Of Rear Of Engine Fuel Pipe Connections
    GM300360Courtesy of GENERAL MOTORS CORP.
    NOTE:
    • Remove the fuel rail assembly carefully in order to prevent damage to the injector electrical connector terminals and the injector spray tips. Support the fuel rail after the fuel rail is removed in order to avoid damaging the fuel rail components.
    • Cap the fittings and plug the holes when servicing the fuel system in order to prevent dirt and other contaminants from entering open pipes and passages.
  13. Disconnect the fuel feed and return pipes (1, 2) from the fuel rail.
  14. Disconnect the fuel pressure regulator vacuum line.
    15. Fig 8: Exploded View Of Fuel Rails & Injector Components
    GM350543Courtesy of GENERAL MOTORS CORP.
  15. Loosen the crossover tube to right fuel rail retainer screw (22).
    16. Fig 9: Removing/Installing Fuel Rail Bolts
    GM376389Courtesy of GENERAL MOTORS CORP.
  16. Remove the fuel rail attaching bolts.
  17. Remove the fuel rail assembly.
    18. Fig 10: View Of Fuel Injector, Clip & O-Rings
    GM351185Courtesy of GENERAL MOTORS CORP.
  18. Remove the injector lower O-ring seal (4) from the spray tip end of each injector (3).
  19. Discard the O-ring seals.
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