Removal Procedure

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

Fig 1: Disconnecting The ECT Sensor Electrical Connector

Courtesy of GENERAL MOTORS CORP.

Drain the cooling system below the level of the engine coolant temperature (ECT) sensor. Refer to Draining and Filling Cooling System (LS4 Static Fill) or Draining and Filling Cooling System (LZE, LZ4, LZ9 Static Fill) or Draining and Filling Cooling System (9C1, 9C3 Static Fill) or Draining and Filling Cooling System (LS4 GE 47716 Fill) or Draining and Filling Cooling System (LZE, LZ4, LZ9, 9C1, 9C3 GE 4771 Fill) .
Disconnect the ECT sensor electrical connector (1).

Fig 2: Locating ECT Sensor

Courtesy of GENERAL MOTORS CORP.