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Home >> GMC >> 2004 >> Sierra 2500 HD, 2D Pickup, 6.6 1, RWD, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 6.6L (Lb7) (Introduction) >> Repair Instructions >> Engine Coolant Temperature (ECT) Sensor Replacement >> Removal Procedure

Removal Procedure

NOTE: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.
  1. Drain the coolant to a level below the engine coolant temperature (ECT) sensor. Refer to Draining and Filling Cooling System (with HP2) or Draining and Filling Cooling System (without HP2) in Engine Cooling.
  2. Disconnect the ECT sensor electrical connector (1).
    3. Fig 1: ECT Sensor Electrical Connector
    GM740506Courtesy of GENERAL MOTORS CORP.
  3. Remove the ECT sensor (1).
    4. Fig 2: ECT Sensor
    GM740508Courtesy of GENERAL MOTORS CORP.
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