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Home >> Cadillac >> 2018 >> Escalade Base, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 2 (Engine Mechanical - 6.0L (L96)) >> Repair Instructions - On Vehicle >> Intake Manifold Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2018 Chevrolet Suburban 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the air cleaner resonator outlet duct. Refer to Air Cleaner Resonator Outlet Duct Replacement
  2. Remove the generator. Refer to Generator Replacement (L96)
    3. Fig 1: Engine Harness Retainer Nut And Electrical Connectors
    GM1696891Courtesy of GENERAL MOTORS COMPANY
  3. Remove the engine harness retainer nut (1).
  4. Remove the engine harness retainer from the stud and locator pin.
  5. Disconnect the engine harness electrical connector (2) from the evaporative emission (EVAP) canister purge solenoid.
  6. Disconnect the engine wiring harness electrical connector (4) from the manifold absolute pressure (MAP) sensor.
    7. Fig 2: CPA Retainer, Electrical Connectors And Engine Harness Clips
    GM1696892Courtesy of GENERAL MOTORS COMPANY
  7. Disconnect the engine harness electrical connectors (3) from the left side fuel injectors.
    8. Fig 3: CPA Retainer, Engine Harness Electrical Connectors And Harness Clips
    GM1696893Courtesy of GENERAL MOTORS COMPANY
  8. Disconnect the engine harness electrical connector (3) from the throttle actuator.
  9. Disconnect the engine harness electrical connectors (7) from the right side fuel injectors.
    10. Fig 4: Engine Wiring Harness, Clip, Bolt And Connector
    GM1696914Courtesy of GENERAL MOTORS COMPANY
  10. Remove the engine harness clip (1) and bolt (3).
  11. Gather the engine harness branches and tie the harness up out of the way to the cowl panel.
    12. Fig 5: EVAP Canister Purge Tube And Quick Connect Fitting
    GM1696917Courtesy of GENERAL MOTORS COMPANY
  12. Disconnect the EVAP canister purge tube (1) quick connect fitting from the EVAP canister purge solenoid. Refer to Plastic Collar Quick Connect Fitting Service
  13. Disconnect the fuel feed line quick connect fitting (2) from the fuel rail. Refer to Metal Collar Quick Connect Fitting Service
    14. Fig 6: Positive Crankcase Ventilation Hose
    GM4332012Courtesy of GENERAL MOTORS COMPANY
  14. Remove the positive crankcase ventilation (PCV) hose (1) from the intake manifold fitting.
  15. Position the hose out of the way.
    16. Fig 7: Intake Manifold And Bolts
    GM4331934Courtesy of GENERAL MOTORS COMPANY
  16. Remove the intake manifold bolts (1) (Qty: 10).
    17. 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.

  17. Remove the intake manifold (2).
  18. Cover the cylinder head passages in order to prevent dirt or debris from entering the passages.
    19. Fig 8: Intake Manifold Gaskets
    GM4331932Courtesy of GENERAL MOTORS COMPANY
  19. Remove and DISCARD the intake manifold gaskets (1).
  20. If replacing the intake manifold, perform the following steps, otherwise proceed to step 17 of the installation procedure.
  21. Place the intake manifold on a clean work surface.
    22. Fig 9: Upper Intake Manifold Cover And Nut
    GM4328175Courtesy of GENERAL MOTORS COMPANY
  22. Remove the upper intake manifold cover nut (1).
  23. Remove the upper intake manifold cover (2).
    24. Fig 10: Manifold Absolute Pressure (MAP) Sensor And Retainer
    GM4331948Courtesy of GENERAL MOTORS COMPANY
  24. Remove the manifold absolute pressure (MAP) sensor retainer (1).
  25. Remove the MAP sensor (2)
    26. Fig 11: EVAP Tube Quick Connect Fitting And EVAP Canister Purge Solenoid
    GM4331956Courtesy of GENERAL MOTORS COMPANY
  26. Disconnect the EVAP tube quick connect fitting (1) at the intake manifold. Refer to Plastic Collar Quick Connect Fitting Service
  27. Disengage the retainer securing the EVAP canister purge solenoid (2) to the fuel rail.
  28. Remove the EVAP tube and purge solenoid.
    29. Fig 12: Throttle Body, Bolts, Nuts And Gasket
    GM4331963Courtesy of GENERAL MOTORS COMPANY
  29. Remove the throttle body bolts (1) (Qty: 2) and nuts (2) (Qty: 2).
  30. Remove the throttle body (4).
  31. Remove and DISCARD the throttle body gasket (3).
    32. Fig 13: Fuel Rail And Bolts
    GM4331966Courtesy of GENERAL MOTORS COMPANY
  32. Remove the fuel rail bolts (1) (Qty: 4).
    33. NOTE:

    Lift evenly on both sides of the fuel rail until all injectors are removed from their bores.

  33. Remove the fuel rail (2).
  34. Remove and discard the fuel injector lower O-ring seals.
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