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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 and Push Rod Replacement - Left Side (L84) >> Removal Procedure

Removal Procedure

  1. GM5527888Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    Positive Crankcase Ventilation Tube Connector (1) @ Positive Crankcase Ventilation Fitting - Disconnect - Plastic Collar Quick Connect Fitting Service

  2. Positive Crankcase Ventilation Tube Connector (2) @ Intake Manifold - Disconnect - Plastic Collar Quick Connect Fitting Service
  3. Positive Crankcase Ventilation Foul Air Tube (3) - Remove
  4. GM5536408Courtesy of GENERAL MOTORS COMPANY

    Grasp the valve rocker arm cover insulator (3) and lift up disengaging the 3 upper intake manifold sight shield grommets (2) from the 3 valve rocker arm cover insulator retainers (1).

  5. Valve Rocker Arm Cover Insulator (3) - Remove
  6. Inspect the 3 upper intake manifold sight shield grommets (2) on the valve rocker arm cover insulator and replace as necessary.
  7. Engine Wiring Harness - Reposition
  8. GM5549185Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Pull only on the spark plug wire boot to remove the wire.
    • Inspect the spark plug wire for damage and replace if necessary.

    Twist the 4 spark plug wire boots a 1/2 turn and remove the 4 spark plug wires (1) from the 4 ignition coils (2).

  9. Inspect the spark plug wire for damage and replace if necessary.
  10. Engine Wiring Harness Connector @ Ignition Coil - Disconnect [ 4x ]
  11. GM5549495Courtesy of GENERAL MOTORS COMPANY

    Fuel Feed Pipe Bolt (1) @ Fuel Feed Pipe (2) - Remove

  12. Fuel Feed Pipe (2) - Reposition
  13. GM5549496Courtesy of GENERAL MOTORS COMPANY

    Valve Rocker Arm Cover Bolt (1) - Loosen until disengaged [ 9x ]

  14. Valve Rocker Arm Cover- Left Side (2) - Remove
  15. GM5549498Courtesy of GENERAL MOTORS COMPANY

    Valve Rocker Arm Cover Gasket (2) @ Valve Rocker Arm Cover (1) - Remove and DISCARD

  16. GM5569335Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Only replace the valve rocker arms and valve push rods as required.
    • The rocker arm pivot support bolts are not serviced separately.
    • Place the valve rocker arms and valve push rods in a rack so they can be installed in the same location from which they were removed.

    Valve Rocker Arm Pivot Support Bolt (2) - Loosen until disengaged

  17. Valve Rocker Arm (1) - Remove
  18. GM5569419Courtesy of GENERAL MOTORS COMPANY

    Valve Push Rod (1) - Remove