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Home >> Cadillac >> 2005 >> CTS V >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 5.7L - Introduction >> Repair Instructions >> Fuel Rail Assembly Replacement >> Removal Procedure
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Removal Procedure

    Fig 1: View Of Fuel Injector Sight Shield
    GM1392497Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to Battery Disconnect Caution in Cautions and Notices.
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
    2. NOTE:
    • Carefully remove the fuel rail assembly 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.
    • Prevent dirt and other contaminants from entering the open pipes and passages. Cap the fittings and plug the holes when servicing the fuel system.
  2. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical - 5.7L.
  3. Relieve the fuel system pressure. Refer to the Fuel Pressure Relief Procedure .
  4. 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 the fuel rail in liquid cleaning solvent.
    5. Fig 2: Identifying Fuel Feed Hose (2)
    GM1392565Courtesy of GENERAL MOTORS CORP.
  5. Remove the engine compartment fuel line (3). Refer to Fuel Hose/Pipes Replacement - Engine Compartment .
  6. Disconnect the engine compartment evaporative emission (EVAP) line (1) from the chassis EVAP line. Refer to Quick Connect Fitting(s) Service (Plastic Collar) .
  7. Disconnect the engine compartment EVAP line from the purge valve. Refer to Quick Connect Fitting(s) Service (Plastic Collar) .
  8. Remove the EVAP line from the vehicle.
    9. Fig 3: View Of Fuel Injector Electrical Connectors
    GM187335Courtesy of GENERAL MOTORS CORP.
  9. Disconnect the fuel injector electrical connectors. Identify the connectors to their corresponding injectors in order to ensure the correct sequential injector firing order after reassembly.
  10. Remove the fuel injector wiring harness retainers from the fuel rail.
    11. Fig 4: Noting Location Of Fuel Rail Ground Strap On Intake Manifold
    GM260133Courtesy of GENERAL MOTORS CORP.
  11. Note the location of the fuel rail ground strap (1) on the intake manifold. The fuel rail ground strap must be installed during assembly.
    12. Fig 5: Fuel Rail Assembly & Bolts
    GM222050Courtesy of GENERAL MOTORS CORP.
  12. Remove the fuel rail attaching bolts.
  13. Remove the fuel rail assembly.
  14. Remove the fuel injectors, if necessary. Refer to Fuel Injector Replacement .
  15. Remove the injector lower O-ring seal from the spray tip end of each injector.
  16. Discard the lower O-ring seals.
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