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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 59 (Engine Controls And Fuel - 2.0L (LSY) - Repair Instructions) >> Repair Instructions >> Fuel Injector Wiring Harness 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. Drain the cooling system. Cooling System Draining and Filling (LSY GE 47716) , or Cooling System Draining and Filling (LSY Static Fill) , or Cooling System Draining and Filling (LSY with V03 Static Fill) , or Cooling System Draining and Filling (LSY with V03 GE 47716)
  2. Disconnect the battery. Battery Negative Cable Disconnection and Connection
  3. Remove the oil fill cap.
  4. GM5335087

    Lift up on the front of the intake manifold cover (1).

  5. GM5335089

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

  6. GM5335764

    Oil Level Indicator (1) - Remove

  7. GM5420336

    Disconnect the electrical connector. (1)

  8. GM5136547
  9. Electrical Connector (1) @ Oil Level Indicator (3) - Unclip
  10. Oil Level Indicator Tube Bracket Bolt (2) - Remove
  11. GM5068106

    Oil Level Indicator Tube (1) - Remove

  12. Oil Level Indicator Tube Seal (2) - Remove and DISCARD
  13. GM5137012

    Electrical Connector (1) - Disconnect [3x]

  14. Retainer (2) @ Upper Intake Manifold Bracket (3) - Unclip [3x]
  15. Wiring Harness (4) - Reposition
  16. GM5137013

    Upper Intake Manifold Cover Bracket Bolt (1) @ Upper Intake Manifold Bracket (2) - Remove [2x]

  17. GM5137016

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

  18. Upper Intake Manifold Bracket (2) - Remove
  19. GM5448536

    Disconnect the evaporative emission canister purge tube quick connects (1). Plastic Collar Quick Connect Fitting Service 

  20. Disconnect the evaporative emission canister purge tube (2) from the retainer (3).
  21. Evaporative Emission Canister Purge Tube (2) - Remove
  22. GM5318338

    Disconnect the quick connect. Plastic Collar Quick Connect Fitting Service 

  23. Evaporative Emission Pipe (1) - Reposition away
  24. GM5117362

    Disconnect the electrical connector from the evaporative emission canister purge pump.

  25. Evaporative Emission Canister Purge Pump Bolt (1) - Remove [3x]
  26. Evaporative Emission Canister Purge Pump (2) - Remove
  27. GM5137171

    Retainer (1) @ Intake Manifold (2) - Unclip [7x]

  28. Wiring Harness (3) - Disconnect and reposition
  29. GM5512539

    Radiator Surge Tank Outlet Hose Clip Bracket Nut (1) - Loosen

  30. Radiator Surge Tank Inlet Pipe Bracket (2) - Reposition
  31. GM5314509

    Retainer Spring (1) @ Throttle Body (3) - Release

  32. Charge Air Cooler Outlet Air Tube (2) - Disconnect
  33. GM5454548

    Charge Air Cooler Outlet Air Tube (2) - Reposition away

  34. Electrical Connector (1) @ Throttle Body (3) - Disconnect
  35. GM5448534

    Intake Manifold Bolt (1) - Remove [7x]

  36. GM5087317

    Intake Manifold (1) - Remove

  37. Intake Manifold Gasket (2) - Remove and DISCARD
  38. GM5123947

    Hose Clamp (1) - Disengage [2x] - Hose Clamp Replacement Guidelines - Spring Type

  39. Thermostat Bypass Hose (2) @ Engine Coolant Flow Control Valve - Remove
  40. Radiator Inlet Hose (3) @ Engine Coolant Flow Control Valve - Remove
  41. GM5123948

    Hose Clamp (1) - Disengage [3x] - Hose Clamp Replacement Guidelines - Spring Type

  42. Engine Coolant Air Bleed Hose (2) @ Engine Coolant Flow Control Valve - Remove
  43. Engine Coolant Air Bleed Hose (3) @ Engine Coolant Flow Control Valve - Remove
  44. Engine Oil Cooler Coolant Inlet Hose (4) @ Engine Coolant Flow Control Valve - Remove
  45. GM5123949

    Electrical Connector (1) @ Engine Coolant Flow Control Valve - Disconnect [2x]

  46. Electrical Connector (2) @ Engine Coolant Temperature Sensor - Disconnect
  47. GM5123951

    Engine Coolant Flow Control Valve Bolt (1) - Remove [4x]

  48. GM5123952

    Engine Coolant Flow Control Valve (1) - Remove

  49. Water Outlet Seal (2) - Remove and DISCARD
  50. GM4995197

    Wiring Harness (2) @ Fuel Injection Fuel Rail Insulator (1) - Position aside

  51. GM5299635
    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 Injection Fuel Rail Insulator (1) - Remove

  52. GM5311583

    Electrical Connector @ Fuel Injection Fuel Rail Fuel Pressure Sensor - Disconnect

  53. Electrical Connector @ Direct Fuel Injector - Disconnect [4x]
  54. Electrical Connector @ Knock Sensor - Disconnect
  55. Electrical Connector @ Engine Coolant Temperature Sensor - Disconnect
  56. Fuel Injector Wiring Harness (1) - Remove