LEMON Manuals: Even more car manuals for everyone
Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 100 (Engine Control System & Fuel - 4.8L, 5.3L, 6.0L And 6.2L - Introduction (2 Of 2)) >> Repair Instructions >> Fuel Rail Assembly Replacement >> Removal Procedure

Removal Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: An 8-digit identification number is located on the fuel rail. Refer to this identification number when servicing or when part replacement is required.
    Fig 1: View Of Engine Harness Retainer Nut & Electrical Connectors
    GM1696891Courtesy of GENERAL MOTORS CORP.
  1. Remove the air cleaner outlet duct. Refer to Air Cleaner Resonator Outlet Duct Replacement .
  2. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .
  3. Remove the engine wiring harness bracket nut (1).
  4. Disconnect the engine wiring harness electrical connector (2) from the evaporative emission (EVAP) purge solenoid.
  5. Disconnect the engine wiring harness electrical connector (3) from the generator.
  6. Disconnect the engine wiring harness electrical connector (4) from the manifold absolute pressure (MAP) sensor.
    7. Fig 2: View Of CPA Retainer, Electrical Connectors & Engine Harness Clips
    GM1696892Courtesy of GENERAL MOTORS CORP.
  7. Remove the connector position assurance (CPA) retainer (2).
  8. Disconnect the engine wiring harness electrical connector (1) from the ignition coil main electrical connector.
  9. Disconnect the engine wiring harness electrical connectors (3) from the fuel injectors, perform the following:
    1. Mark the connectors to their corresponding injectors to ensure correct reassembly.
    2. Pull the CPA retainer on the connector up 1 click.
    3. Push the tab on the connector in.
    4. Disconnect the fuel injector electrical connector.
    10. Fig 3: View Of CPA Retainer, Engine Harness Electrical Connectors & Harness Clips
    GM1696893Courtesy of GENERAL MOTORS CORP.
  10. Remove the CPA retainer (2).
  11. Disconnect the engine wiring harness electrical connector (1) from the ignition coil main electrical connector.
  12. Disconnect the engine wiring harness electrical connector (3) from the electronic throttle control.
  13. Disconnect the engine wiring harness electrical connectors (7) from the fuel injectors, perform the following:
    1. Mark the connectors to their corresponding injectors to ensure correct reassembly.
    2. Pull the CPA retainer on the connector up 1 click.
    3. Push the tab on the connector in.
    4. Disconnect the fuel injector electrical connector.
  14. Remove the engine wiring harness clip (4) from the generator battery jumper cable.
  15. Remove the engine wiring harness clip (6) from the ignition coil bracket stud.
    16. Fig 4: View Of Battery Cable Terminals & Stud
    GM1699543Courtesy of GENERAL MOTORS CORP.
  16. Remove the negative battery cable stud (1) from the right cylinder head.
  17. Remove the negative battery cable terminal (2) and engine wiring harness ground terminal (3) from the cylinder head.
    18. Fig 5: View Of Engine Wiring Harness, Clip, Bolt & Connector
    GM1696914Courtesy of GENERAL MOTORS CORP.
  18. Remove the engine wiring harness clip bolt (3) from the generator bracket.
  19. Gather the branches of the engine wiring harness and reposition the aside.
    20. Fig 6: View Of PCV Hose
    GM1696791Courtesy of GENERAL MOTORS CORP.
  20. Remove the positive crankcase ventilation (PCV) hose.
    21. Fig 7: View Of EVAP Canister Purge Tube & Quick Connect Fitting
    GM1696917Courtesy of GENERAL MOTORS CORP.
  21. Disconnect the chassis fuel feed pipe (2) quick connect fitting from the fuel rail. Refer to Quick Connect Fitting Service - Metal Collar .
    22. Fig 8: View Of EVAP Tube & Purge Solenoid
    GM1697062Courtesy of GENERAL MOTORS CORP.
  22. Disconnect the EVAP tube quick connect fitting at the intake manifold. Refer to Quick Connect Fitting Service - Plastic Collar .
  23. Disengage the retainer securing the EVAP canister purge solenoid to the fuel rail.
  24. Remove the EVAP tube and purge solenoid.
    25. Fig 9: View Of Fuel Rail & Bolts
    GM1697066Courtesy of GENERAL MOTORS CORP.
  25. Remove the fuel rail bolts.
    26. 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.
    IMPORTANT:
    • Before removal, clean the fuel rail with a spray type engine cleaner, such as GM X-30A or equivalent, if necessary. Follow the package instructions. Do not soak the fuel rail in liquid cleaning solvent.
    • Lift evenly on both sides of the fuel rail until all injectors are removed from their bores.
  26. Remove the fuel rail assembly.
    27. Fig 10: View Of Fuel Rail & Components
    GM1706106Courtesy of GENERAL MOTORS CORP.
  27. Remove the fuel injector retainers (1).
  28. Remove the fuel injectors (3) from the fuel rail.
  29. Remove and discard the fuel injector upper and lower O-ring seals (2 and 4).
    30. Fig 11: View Of Fuel Rail Cross Over Pipe & Components
    GM1706110Courtesy of GENERAL MOTORS CORP.
  30. Remove the fuel rail crossover pipe retainer screws (2).
  31. Remove the fuel rail crossover pipe retainers (3).
  32. Remove the fuel rail crossover pipe (1) from the fuel rails.
  33. Remove and discard the fuel rail crossover pipe O-ring seals (4).
  34. Replace the left and/or right fuel rail as required.
scientia non olet · About LEMON Manuals