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Home >> Buick >> 2009 >> Allure Super >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 5.3L - Introduction >> Repair Instructions >> Fuel Injection Fuel Rail Assembly Replacement >> Installation Procedure
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Installation Procedure

NOTE: Do not reuse the fuel injector O-ring seals. Install NEW O-ring seals during assembly.
    Fig 1: View Of Fuel Rail Ground Strap
    GM1411903Courtesy of GENERAL MOTORS CORP.
  1. Note the installed location of the fuel rail ground strap (557).
    2. Fig 2: View Of Fuel Rail Bolts, Ground Strap & Manifold Bolts
    GM1411905Courtesy of GENERAL MOTORS CORP.
  2. If replacing the fuel rail, install the fuel injectors. Refer to Fuel Injector Replacement .
  3. If necessary, Lubricate the NEW O-ring seals with clean engine oil.
  4. If necessary, install NEW O-ring seals to the fuel injectors.
  5. Install the fuel rail (510) with injectors. Push firmly on both sides of the rail until all the injectors have been seated into their bores.
  6. Apply a 5 mm (0.2 in) band of threadlock GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the threads of the fuel rail bolts.
    7. CAUTION: Refer to Fastener Caution .
  7. Install the fuel rail bolts (511).

    Tighten:  Tighten the bolts to 10 N.m (89 lb in).

  8. Install the ground strap (557) and intake manifold bolt (512).

    Tighten:  Tighten the bolt to 10 N.m (89 lb in).

    9. Fig 3: View Of Fuel Feed Line & Evaporative Emission (EVAP) Line
    GM1551868Courtesy of GENERAL MOTORS CORP.
  9. Connect the fuel feed (1) and EVAP (2) lines. Refer to Metal Collar Quick Connect Fitting Service  and Plastic Collar Quick Connect Fitting Service .
    10. Fig 4: View Of Engine Wiring Harness & Retainers
    GM1551869Courtesy of GENERAL MOTORS CORP.
  10. Position the harness to the engine. Install the engine wiring harness retainers to the tabs on the fuel rail.
    11. Fig 5: View Of Ignition Coil Main Electrical Connectors
    GM1551871Courtesy of GENERAL MOTORS CORP.
    NOTE: Install the marked injector connectors to their corresponding injectors.
  11. Connect the fuel injector electrical connectors (2, 4).
  12. Connect the main ignition coil harness electrical connector (1).
  13. Install the CPA retainer (3).
    14. Fig 6: View Of Ignition Coil Main Electrical Connectors
    GM1551870Courtesy of GENERAL MOTORS CORP.
    NOTE: Install the marked injector connectors to their corresponding injectors.
  14. Connect the fuel injector electrical connectors (1, 2).
  15. Connect the main ignition coil harness electrical connector (4).
  16. Install the CPA retainer (3).
    17. Fig 7: View Of Generator Electrical Connectors
    GM1552786Courtesy of GENERAL MOTORS CORP.
  17. Connect the generator electrical connector (2).
    18. Fig 8: View Of Electrical Connectors
    GM1551867Courtesy of GENERAL MOTORS CORP.
  18. Connect the following electrical connectors:
    • EVAP purge solenoid (1)
    • MAP sensor (2)
    • ETC (3)
    • Oil pressure sensor (4)
    • Valve lifter oil manifold (5)
  19. Install the air cleaner outlet duct. Refer to Air Cleaner Resonator Outlet Duct Replacement .
  20. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (LS4) .
  21. Use the following steps to inspect for leaks:
    1. Turn the ignition ON, with the engine OFF, for 2 seconds.
    2. Turn the ignition OFF for 10 seconds.
    3. Turn the ignition ON with the engine OFF.
    4. Inspect for leaks.
  22. Install the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement .
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