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Home >> Chevrolet >> 2004 >> Avalanche 1500, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Engine Control System - 8.1L (Introduction)) >> Repair Instructions >> Engine Coolant Temperature (ECT) Sensor Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
NOTE: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.
    Fig 1: View Of Ignition Coil, ECT And MAP Sensor Electrical Connectors
    GM750529Courtesy of GENERAL MOTORS CORP.
  1. Drain the cooling system to a level below the engine coolant temperature (ECT) sensor. Refer to Draining and Filling Cooling System in Engine Cooling.
  2. Disconnect the ECT sensor electrical connector (3).
    3. Fig 2: View Of ECT Sensor Electrical Connector At Oil Fill Tube Bracket
    GM858201Courtesy of GENERAL MOTORS CORP.
  3. Remove the ECT sensor electrical connector from the oil fill tube bracket.
    4. Fig 3: View Of ECT Sensor
    GM858203Courtesy of GENERAL MOTORS CORP.
  4. Remove the ECT sensor.
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