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Home >> Chevrolet >> 2004 >> Avalanche 2500 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Engine Control System - 4.8L, 5.3L & 6.0L (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 Engine Wiring Harness Ground Bolt, ECT Sensor Electrical Connector, Negative Battery Cable & Harness Ground (4.8L, 5.3L, and 6.0L Engines)
    GM1235684Courtesy of GENERAL MOTORS CORP.
  1. Drain the cooling system to a level below the engine cooling temperature (ECT) sensor. Refer to Draining and Filling Cooling System in Engine Cooling.
  2. Disconnect the ECT sensor electrical connector (5).
  3. Fig 2: View Of Engine Coolant (ECT) Sensor
    GM855737Courtesy of GENERAL MOTORS CORP.
  4. Remove the ECT sensor.