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Home >> Cadillac >> 2021 >> CT4 Sport, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 60 (Engine Controls And Fuel - 2.7L (L3B) - Repair Instructions) >> Repair Instructions >> Gas Engine Ignition Spark Plug Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the oil fill cap.
  2. GM5432171

    Intake Manifold Cover Bolt (1) - Remove

  3. Lift up on the front of the intake manifold cover (2).
  4. GM5432174

    Intake Manifold Cover (1) @ Upper Intake Manifold Bracket (2) - Remove

  5. GM5457059

    Electrical Connector (1) - Disconnect [5x]

  6. Wiring Harness (2) - Reposition
  7. GM5457857

    Upper Intake Manifold Cover Nut (1) - Remove [2x]

  8. Radiator Surge Tank Inlet Hose Clip (2) @ Upper Intake Manifold Bracket (3) - Remove
  9. GM5457786

    Upper Intake Manifold Cover Nut (1) - Remove [2x]

  10. Upper Intake Manifold Bracket (2) - Remove
  11. GM5404490

    Disconnect the ignition coil electrical connector.

  12. Ignition Coil Bolt (1) - Remove [2x]
  13. Ignition Coil (2) - Remove
  14. GM5404493
    NOTE:

    Only replace the faulty spark plug.

    Spark Plug (1) - Remove

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