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Removal Procedure

    Fig 1: Identifying engine wiring harness electrical connector
    GM1769036Courtesy of GENERAL MOTORS COMPANY
  1. Partially drain the cooling system to a level below the engine coolant temperature (ECT) sensor. Refer to Cooling System Draining and Filling (Static Fill) , Cooling System Draining and Filling (Vac N Fill) .
  2. Disconnect the engine wiring harness electrical connector (1) from the ECT sensor electrical connector.
  3. Remove the ECT sensor electrical connector from the camshaft cover.
  4. CAUTION:

    Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.

  5. Using the J-45861  sensor socket (2), carefully remove the ECT sensor from the cylinder head.