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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 >> Intake Manifold Replacement (L84) >> Removal Procedure

Removal Procedure

  1. GM5001375Courtesy of GENERAL MOTORS COMPANY

    Air Cleaner Outlet Duct Bracket Bolt (1) - Remove

  2. Remove engine wiring harness from air cleaner outlet duct bracket.
  3. GM5001379Courtesy of GENERAL MOTORS COMPANY

    Positive Crankcase Ventilation Fresh Air Tube (1) - Disconnect - Plastic Collar Quick Connect Fitting Service

  4. Air Cleaner Outlet Duct Clamp (2) - Loosen [ 2x ]
  5. Air Cleaner Outlet Duct (3) - Remove
  6. GM5571687Courtesy of GENERAL MOTORS COMPANY

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

  7. GM5538400Courtesy of GENERAL MOTORS COMPANY

    Evaporative Emission Canister Purge Tube Connector (1) @ Evaporative Emission Canister Purge Solenoid Valve - Disengage - Plastic Collar Quick Connect Fitting Service

  8. Evaporative Emission Canister Purge Tube (2) @ Evaporative Emission Canister Purge Solenoid Valve - Remove and position aside
  9. GM5540971Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness Connector (1) @ Throttle Body - Disconnect

  10. Engine Wiring Harness Retainer (2) @ Intake Manifold Cover - Remove [ 2x ]
  11. Engine Wiring Harness Connector (3) @ Manifold Absolute Pressure Sensor - Disconnect
  12. Engine Wiring Harness Connector (4) @ Evaporative Emission Canister Purge Solenoid Valve - Disconnect
  13. GM5540973Courtesy of GENERAL MOTORS COMPANY

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

  14. GM5540974Courtesy of GENERAL MOTORS COMPANY

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

  15. GM5527888Courtesy of GENERAL MOTORS COMPANY

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

  16. GM5540977Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    Loosen the 10 intake manifold bolts (1) until the bolts are no longer threaded into the cylinder heads.

  17. Move the intake manifold and intake manifold cover (2) forward enough to gain access to the rear engine wiring harness retainers.
  18. GM5540975Courtesy of GENERAL MOTORS COMPANY

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

  19. GM5540978Courtesy of GENERAL MOTORS COMPANY
    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.

    Remove the intake manifold and intake manifold cover (1) as an assembly.

  20. Cover the cylinder head passages in order to prevent dirt or debris from entering the passages.
  21. GM5540992Courtesy of GENERAL MOTORS COMPANY

    Intake Manifold Cover Bolt (1) - Remove [ 4x ]

  22. Intake Manifold Cover (2) - Remove
  23. GM5541471Courtesy of GENERAL MOTORS COMPANY

    Intake Manifold Gasket (1) - Remove and DISCARD [ 8x ]

  24. GM5541483Courtesy of GENERAL MOTORS COMPANY

    Throttle Body Bolt (1) - Remove [ 4x ]

  25. Throttle Body (2) - Remove
  26. Throttle Body Gasket (3) - Remove and DISCARD
  27. GM5541475Courtesy of GENERAL MOTORS COMPANY

    Manifold Absolute Pressure Sensor Bolt (1) - Remove

  28. Manifold Absolute Pressure Sensor (2) - Remove
  29. Evaporative Emission Canister Purge Solenoid Valve Bolt (4) - Remove
  30. Evaporative Emission Canister Purge Solenoid Valve (3) - Remove
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