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Home >> GMC >> 2004 >> Jimmy 4D Utility, 4WD, Automatic >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System - 4.3L (Introduction) >> Repair Instructions >> Engine Coolant Temperature (ECT) Sensor Replacement >> Removal Procedure
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Removal Procedure

  1. Turn OFF the ignition.
    2. Fig 1: View Of Air Cleaner Cover & Air Cleaner Outlet Duct
    GM288463Courtesy of GENERAL MOTORS CORP.
  2. Loosen the wing nuts on the air cleaner cover and air cleaner outlet duct.
  3. Move the air intake assembly aside.
  4. Drain the cooling system below the level of the engine coolant temperature (ECT) sensor. Refer to Draining and Filling Cooling System in Engine Cooling.
    5. Fig 2: View Of ECT Sensor Harness Connector
    GM246797Courtesy of GENERAL MOTORS CORP.
  5. Disconnect the ECT sensor harness connector.
    6. Fig 3: View Of ECT Sensor
    GM246800Courtesy of GENERAL MOTORS CORP.
  6. Remove the ECT sensor.
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