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Home >> Chevrolet >> 2009 >> Impala SS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 5.3L - Introduction >> Repair Instructions >> Fuel Injection Fuel Rail Assembly Replacement >> Removal Procedure
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Removal Procedure

NOTE: Clean the fuel and evaporative emission (EVAP) connections and surrounding areas prior to disconnecting the lines in order the avoid possible system contamination.
    Fig 1: View Of Electrical Connectors
    GM1551867Courtesy of GENERAL MOTORS CORP.
  1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief (Without CH 48027) or Fuel Pressure Relief (With CH 48027) .
  2. Remove the air cleaner outlet duct. Refer to Air Cleaner Resonator Outlet Duct Replacement .
  3. Disconnect the following electrical connectors:
    • EVAP purge solenoid (1)
    • Manifold absolute pressure (MAP) sensor (2)
    • Electronic throttle control (ETC) (3)
    • Oil pressure sensor (4)
    • Valve lifter oil manifold (5)
    4. Fig 2: View Of Generator Electrical Connectors
    GM1552786Courtesy of GENERAL MOTORS CORP.
  4. Disconnect the generator electrical connector (2).
    5. Fig 3: View Of Ignition Coil Main Electrical Connectors
    GM1551870Courtesy of GENERAL MOTORS CORP.
  5. Remove the connector position assurance (CPA) retainer (3).
  6. Disconnect the main ignition coil harness electrical connector (4).
    7. NOTE: Mark the injector connectors to their corresponding injectors to ensure correct reassembly.
  7. Disconnect the fuel injector electrical connectors (1, 2).
    8. Fig 4: View Of Ignition Coil Main Electrical Connectors
    GM1551871Courtesy of GENERAL MOTORS CORP.
  8. Remove the CPA retainer (3).
  9. Disconnect the main ignition coil harness electrical connector (1).
    10. NOTE: Mark the injector connectors to their corresponding injectors to ensure correct reassembly.
  10. Disconnect the fuel injector electrical connectors (2, 4).
    11. Fig 5: View Of Engine Wiring Harness & Retainers
    GM1551869Courtesy of GENERAL MOTORS CORP.
  11. Remove the engine wiring harness retainers from the tabs on the fuel rail. Reposition the harness out of the way.
    12. Fig 6: View Of Fuel Feed Line & Evaporative Emission (EVAP) Line
    GM1551868Courtesy of GENERAL MOTORS CORP.
  12. Disconnect the fuel feed (1) and EVAP (2) lines. Refer to Metal Collar Quick Connect Fitting Service  and Plastic Collar Quick Connect Fitting Service .
    13. Fig 7: View Of Fuel Rail Ground Strap
    GM1411903Courtesy of GENERAL MOTORS CORP.
  13. Note the location of the fuel rail ground strap (557).
    14. Fig 8: View Of Fuel Rail Bolts, Ground Strap & Manifold Bolts
    GM1411905Courtesy of GENERAL MOTORS CORP.
  14. Remove the intake manifold bolt (512) and ground strap (557).
  15. Remove the fuel rail bolts (511).
  16. Remove the fuel rail (510) with injectors. Lift evenly on both sides of the fuel rail until all injectors have been removed from their bores.
    17. NOTE: Do not separate the fuel injectors from the fuel rail unless component service is required.
  17. If replacing the fuel rail, remove the fuel injectors. Refer to Fuel Injector Replacement .
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