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Home › Chevrolet › 2011 › Cutaway 6.6 L › Repair and Diagnosis › Engine Performance › Engine Control Systems › Engine Controls And Fuel - 6.6L (LGH) - Repair Instructions › Repair Instructions › Fuel Injector Replacement (Left Side) › Installation Procedure

Installation Procedure

    Fig 1: Fuel Injectors
    GM2369542Courtesy of GENERAL MOTORS CORP.
  1. Install a NEW copper washer to the fuel injector bore.
  2. Install a NEW fuel injector O-ring to the injector.
  3. Install the fuel injectors (1) with brackets (2).
    4. Fig 2: Fuel Injector Bracket Bolts
    GM2369529Courtesy of GENERAL MOTORS CORP.
    CAUTION:

    Refer to Fastener Caution .

  4. Install the fuel injector bracket fasteners (1) and tighten to 30 N.m (22 lb ft) .
    5. Fig 3: Fuel Pipes, Bracket And Fasteners
    GM2369510Courtesy of GENERAL MOTORS CORP.
    CAUTION:

    Ensure proper torquing of the fuel injector line. An under-torqued fuel injector line will not seal properly and an over-torqued fuel injector line may damage the fuel injector fitting. An improperly sealed or damaged fuel injector line or fuel injector fitting will cause a fuel leak.

  5. Install the left fuel injector pipes (2) and tighten to 30 N.m (22 lb ft).
  6. Install the fuel pipe bracket fasteners (1) and tighten to 10 N.m (89 lb in).
  7. After installing the fuel injector pipes, clean the injector pipes and apply sealant GM P/N 97720043, at the fittings to prevent moisture and debris from collecting between the line and fitting.
    8. Fig 4: Fuel Return Pipes
    GM2369711Courtesy of GENERAL MOTORS CORP.
  8. Reposition and connect and the fuel return pipes (1).
    9. Fig 5: Fuel Injector Electrical Connectors
    GM2369508Courtesy of GENERAL MOTORS CORP.
  9. Connect the fuel injector electrical connectors (1).
    10. Fig 6: Engine Wiring Harness Bracket Fasteners
    GM2369489Courtesy of GENERAL MOTORS CORP.
  10. Position the engine wiring harness, and install the engine wiring harness bracket fasteners (1) and tighten to 21 N.m (15 lb ft).
  11. Install the glow plug module and bracket. Refer to Glow Plug Control Module Replacement .
  12. If equipped, install the auxiliary generator. Refer to Auxiliary Generator Replacement (KD9) .
  13. Install the upper fan shroud. Refer to Engine Coolant Fan Upper Shroud Replacement (4.3L, 4.8L, 5.3L, 6.0L, 6.2L, 7.0L) , Engine Coolant Fan Upper Shroud Replacement (Diesel) .
  14. If the fuel injectors were replaced, refer to Fuel Injector Flow Rate Programming .
  15. Prime the fuel system. Refer to Fuel System Priming .
  16. Start the engine. If the engine stalls, repeat the above step.
  17. Once the engine starts, inspect for fuel leaks.
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