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Home >> GMC >> 2002 >> C3500 HD 8.1 G, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 8.1L >> 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. Turn OFF the ignition.
  2. Drain the cooling system below the level of the ECT sensor. Refer to DRAINING AND FILLING COOLING SYSTEM in Engine Cooling.
  3. Disconnect the ECT electrical connector (2).
  4. Remove the ECT electrical connector from the bracket (1).
  5. Remove the ECT sensor (3).
    Fig 1: ECT Electrical Connect, Sensor & Bracket
    G01598872Courtesy of GENERAL MOTORS CORP.
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