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Home >> Buick >> 2009 >> Allure CX >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Control System & Fuel System - 5.3L - Introduction) >> Repair Instructions >> Engine Coolant Temperature Sensor Replacement >> Removal Procedure
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Removal Procedure

WARNING: This page is about a different variant/trim than selected.
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
    GM1554549Courtesy of GENERAL MOTORS CORP.
  1. 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) .
  2. Disconnect the ECT sensor electrical connector (1).
    3. Fig 2: Locating ECT Sensor
    GM50974Courtesy of GENERAL MOTORS CORP.
  3. Remove the ECT sensor.
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