Removal Procedure

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

Fig 1: 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 Cooling System Draining and Filling (LS4 Static Fill) or Cooling System Draining and Filling (LS4 GE 47716 Fill) .
Disconnect the ECT sensor electrical connector (1).

Fig 2: Locating ECT Sensor

Courtesy of GENERAL MOTORS CORP.