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Home >> Cadillac >> 2004 >> CTS V >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 5.7L - Introduction >> Repair Instructions >> Engine Coolant Temperature (ECT) Sensor Replacement >> Removal Procedure

Removal Procedure

  1. Turn OFF the ignition.
    2. CAUTION: Refer to Vehicle Lifting Caution in Cautions and Notices.
  2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Drain the engine coolant below the level of the engine coolant temperature (ECT) sensor. Refer to Draining and Filling Cooling System (LA3, LY9) , Draining and Filling Cooling System (LY7) or Draining and Filling Cooling System (LS6) in Engine Cooling.
  4. Lower the vehicle.
    5. Fig 1: View of ECT Sensor Electrical Connector
    GM50967Courtesy of GENERAL MOTORS CORP.
  5. Disconnect the harness connector from the ECT sensor.
    6. Fig 2: Locating ECT Sensor
    GM50974Courtesy of GENERAL MOTORS CORP.
    NOTE: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.
  6. Remove the ECT sensor.
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