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Home >> GMC >> 2021 >> Yukon XL AT4 >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 5.3L (L84) Or 6.2L (L87) - Repair Instructions (10 Of 12) >> Repair Instructions >> Valve Rocker Arm Oil Control Valve Harness Replacement (L84) >> Installation Procedure

Installation Procedure

  1. GM5568596Courtesy of GENERAL MOTORS COMPANY

    Valve Rocker Arm Oil Control Valve Harness (2) @ Valve Lifter Oil Solenoid Valve - Connect [ 8x ]

  2. Positive Crankcase Ventilation Oil Separator Bolt (1) - Hand tighten [ 4x ]
    3. CAUTION:

    Refer to Fastener Caution .

  3. Positive Crankcase Ventilation Oil Separator Bolt (1) - Tighten [ 4x ] - Fastener Specifications
  4. GM5567753Courtesy of GENERAL MOTORS COMPANY

    Wiring Harness Connector Seal (1) @ Valve Rocker Arm Oil Control Valve Harness (2) - Install NEW

  5. GM5567750Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    All gasket surfaces should be free of oil or other foreign material during assembly.

    Engine Block Valley Cover Gasket (2) @ Engine Block Valley Cover (1) - Install NEW

  6. GM5567748Courtesy of GENERAL MOTORS COMPANY

    Engine Block Valley Cover (1) - Install

  7. Engine Block Valley Cover Bolt (2) - Hand tighten [ 9x ]
  8. Engine Block Valley Cover Bolt (2) - Tighten in sequence [ 9x ] - Fastener Specifications
  9. GM5567747Courtesy of GENERAL MOTORS COMPANY

    Valve Rocker Arm Oil Control Valve Extension Harness (1) @ Valve Rocker Arm Oil Control Valve Harness - Connect

  10. GM5571633Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Do NOT use any type of lubricant when installing the NEW 4 bank 1 fuel injector seals (1) on the fuel injector.

    Fuel Injector Seal (1) - Install NEW [ 4x ]

  11. GM5044586Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Do NOT use any type of lubricant when installing NEW seals (2) on the injector.

    Install EN-51105-1  Seal Installer Long Guide (3) onto the fuel injector tip. Place a NEW seal (2) on EN-51105-1  Seal Installer Long Guide.

    1. Using EN-49245-3  Seal Installer Pusher (1), install the seal onto the first recessed area (4) of the fuel injector.
      2. NOTE:

      The EN-49245-4  Seal Sizer is two sided, and either direction will size the seal correctly.

    2. Compress the seal with your fingers, then resize the seal using the EN-49245-4  Seal Sizer (5).
  12. GM5044590Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Do NOT use any type of lubricant when installing NEW seals (2) on the injector.

    Install EN-51105-2  Seal Installer Short Guide (3) onto the fuel injector tip. Place a NEW seal (2) on EN-51105-2  Seal Installer Short Guide.

    1. Using EN-49245-3  Seal Installer Pusher (1), install the seal onto the second recessed area (4) of the fuel injector.
      2. NOTE:

      The EN-49245-4  Seal Sizer is two sided, and either direction will size the seal correctly.

    2. Compress the seal with your fingers, then resize the seal using the EN-49245-4  Seal Sizer (5).
    3. Inspect the NEW fuel injector nozzle housing seals on ALL injectors, ensuring the seals are seated correctly. All seals must be fixed tight, and accurately to the fuel injector nozzle, with no overlap, buckling, or corrugation present. Replace any seal that is incorrectly seated on the fuel injector nozzle with a NEW seal.
  13. GM5575823Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The fuel injection fuel rail bolts are retained into the rails using keepers. Care should be taken to ensure that the threadlock is installed after the fasteners are installed in their bore.

    If NEW threaded components are being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded components are reused, prepare the threaded components using the following steps:

    1. Remove any loose cured adhesive from the external threads of the components using a lint free cloth.
    2. Thread the cleaned components into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Apply thread locking adhesive to the external threads of the components. Adhesives, Fluids, Lubricants, and Sealers
    4. Ensure there are no gaps in the thread locking adhesive once applied to the component.
    14. NOTE:

    Start the fuel injection fuel rail bolts by hand then draw the injector rail down evenly prior to tightening.

  14. Fuel Injection Fuel Rail Bolt (1) @ Fuel Injection Fuel Rail (2) - Install [ 4x ]
  15. Install the fuel injection fuel rail assembly (2) to the cylinder head.
  16. Fuel Injection Fuel Rail Bolt (1) - Tighten [ 4x ] - Fastener Specifications
  17. Connect the electrical wiring harness connectors to the fuel injection fuel rail.
  18. GM5026400Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The camshaft must be in the base circle position before the fuel pump is installed.

    Using EN-51092  Fuel Pump Installation Gauge (2) ensure that the camshaft lobe is in the base circle position. At base circle position, the EN-51092  Fuel Pump Installation Gauge (2) will be flush with the top surface of the lifter oil manifold assembly (1).

  19. GM5568498Courtesy of GENERAL MOTORS COMPANY

    Ensure the 2 plastic fastener retainers (3) are installed in the fuel pump mounting holes before installing the fuel pump.

  20. Fuel Pump Bracket Gasket (5) - Install NEW
  21. Fuel Pump (4) - Install
  22. Fuel Pump Cover (2) - Install
    23. CAUTION:

    Alternately hand-tighten the fuel pump bolts one turn at a time until the pump is fully seated. Trying to draw down the pump without even side-to-side tightening may result in pump plunger damage.

  23. Fuel Pump Bolt (1) - Install and hand tighten [ 2x ]
  24. Fuel Pump Bolt (1) - Tighten [ 2x ] - Fastener Specifications
  25. Reposition the fuel pump and fuel injector wiring harness and connect as necessary.
  26. GM5614523Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Do NOT reuse the fuel feed intermediate pipe (1). If the 2 fuel feed intermediate pipe nuts (3) are loosened or the fuel feed intermediate pipes are removed, the fuel feed intermediate pipes MUST be replaced.

    Fuel Feed Intermediate Pipe (1) - Install NEW

    1. Slide the 2 fuel feed intermediate pipe nuts (3) back along fuel feed intermediate pipe (1) to reveal the 2 formed ends (2) of the fuel feed intermediate pipe (1).
    2. Carefully install the 2 formed ends (2) of the fuel feed intermediate pipe (1) into the sockets of the left and right fuel injection fuel rail. Take care not to hit the 2 formed ends (2) of the fuel feed intermediate pipe (1) on the threaded sockets on the fuel injection fuel rails.
    3. Hold the fuel feed intermediate pipe (1) firmly in place and hand tighten the 2 fuel feed intermediate pipe nuts (3).
  27. Fuel Feed Pipe Bolt (4) - Tighten - Fastener Specifications
  28. Fuel Feed Intermediate Pipe Nut (3) - Tighten [ 2x ] - Fastener Specifications
  29. GM5608922Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Do NOT reuse the fuel feed intermediate pipe (1). If the 2 fuel feed intermediate pipe nuts (2) are loosened or the fuel feed intermediate pipes are removed, the fuel feed intermediate pipes MUST be replaced.

    Fuel Feed Intermediate Pipe (1) - Install NEW

    1. Slide the 2 fuel feed intermediate pipe nuts (2) back along fuel feed intermediate pipe (1) to reveal the 2 formed ends (3) of the fuel feed intermediate pipe (1).
    2. Carefully install the 2 formed ends (3) of the fuel feed intermediate pipe (1) into the sockets of the fuel pump (4) and the fuel feed intermediate pipe (5). Take care not to hit the 2 formed ends (3) of the fuel feed intermediate pipe (1) on the threaded sockets of the fuel pump (4) and fuel feed intermediate pipe (5).
    3. Hold the fuel feed intermediate pipe (1) firmly in place and hand tighten the 2 fuel feed intermediate pipe nuts (2).
  30. Fuel Feed Intermediate Pipe Nut (2) - Tighten [ 2x ] - Fastener Specifications
  31. GM5569057Courtesy of GENERAL MOTORS COMPANY

    Fuel Feed Pipe (2) - Install

  32. Fuel Feed Pipe (2) - Connect - Metal Collar Quick Connect Fitting Service
  33. Fuel Feed Pipe Bolt (1) - Install and tighten - Fastener Specifications
  34. GM5569054Courtesy of GENERAL MOTORS COMPANY

    Fuel Feed Pipe (1) - Install

  35. Fuel Feed Pipe (1) - Connect - Metal Collar Quick Connect Fitting Service
  36. GM5557530Courtesy of GENERAL MOTORS COMPANY
    WARNING:

    The noise cancelling foam component MUST be replaced if it has been exposed to engine fluids. Failure to replace the noise cancelling foam component that has been exposed to engine fluids may result in an engine fire resulting in catastrophic engine damage, and possible injury or death.

    Fuel Pump Insulator (1) - Install

  37. Remove the covers from the cylinder head passages.
  38. GM5541471Courtesy of GENERAL MOTORS COMPANY

    Intake Manifold Gasket (1) - Install NEW [ 8x ]

  39. GM5540978Courtesy of GENERAL MOTORS COMPANY

    If NEW threaded components are being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded components are reused, prepare the threaded components using the following steps:

    1. Remove any loose cured adhesive from the external threads of the components using a lint free cloth.
    2. Thread the cleaned components into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Apply thread locking adhesive to the external threads of the components. Adhesives, Fluids, Lubricants, and Sealers
    4. Ensure there are no gaps in the thread locking adhesive once applied to the component.
    40. NOTE:

    The aid of an assistant may be helpful in holding the engine harness up out of the way so the upper intake manifold cover does not get caught against the engine harness.

  40. Position the intake manifold and Intake manifold cover (1) to install harness retainers.
  41. GM5540975Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness Retainer (1) @ Intake Manifold Cover (2) - Install [ 4x ]

  42. Move the intake manifold and intake manifold cover (2) into place.
  43. GM5540977Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    Intake Manifold Bolt (1) - Hand tighten [ 10x ]

  44. Intake Manifold Bolt (1) - Tighten in sequence [ 10x ] - Fastener Specifications
  45. GM5527888Courtesy of GENERAL MOTORS COMPANY

    Positive Crankcase Ventilation Tube Connector (2) @ Intake Manifold - Install - Plastic Collar Quick Connect Fitting Service

  46. GM5540974Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness Retainer (1) @ Intake Manifold Cover (2) - Install [ 3x ]

  47. GM5540973Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness Retainer (1) @ Intake Manifold Cover (2) - Install [ 4x ]

  48. GM5540971Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness Connector (4) @ Evaporative Emission Canister Purge Solenoid Valve - Connect

  49. Engine Wiring Harness Connector (3) @ Manifold Absolute Pressure Sensor - Connect
  50. Engine Wiring Harness Retainer (2) @ Intake Manifold Cover - Install [ 2x ]
  51. Engine Wiring Harness Connector (1) @ Throttle Body - Connect
  52. GM5538400Courtesy of GENERAL MOTORS COMPANY

    Evaporative Emission Canister Purge Tube (2) @ Evaporative Emission Canister Purge Solenoid Valve - Install

  53. Evaporative Emission Canister Purge Tube Connector (1) @ Evaporative Emission Canister Purge Solenoid Valve - Engage - Plastic Collar Quick Connect Fitting Service
  54. GM5571687Courtesy of GENERAL MOTORS COMPANY

    Plenum Front Panel Outer Reinforcement (1) - Install - Plenum Front Panel Outer Reinforcement Removal and Installation

  55. GM5001379Courtesy of GENERAL MOTORS COMPANY

    Air Cleaner Outlet Duct (3) - Install

    56. CAUTION:

    Refer to Component Fastener Tightening Caution .

  56. Air Cleaner Outlet Duct Clamp (2) - Tighten [ 2x ] - Fastener Specifications
  57. Positive Crankcase Ventilation Fresh Air Tube (1) - Connect - Plastic Collar Quick Connect Fitting Service
  58. GM5001375Courtesy of GENERAL MOTORS COMPANY

    Air Cleaner Outlet Duct Bracket Bolt (1) - Install and tighten - Fastener Specifications

  59. Install engine wiring harness to air cleaner outlet duct bracket.
  60. Start the engine and check for fuel leaks.
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