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Home >> Hummer >> 2008 >> H3 Base, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 297 (Engine Control System & Fuel System - 2.9L - Introduction, Service & Repair) >> Repair Instructions >> Engine Coolant Temperature Sensor Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2009 GMC Canyon and 2009 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Identifying engine wiring harness electrical connector
    GM1769036Courtesy of GENERAL MOTORS CORP.
  1. Partially drain the cooling system to a level below the engine coolant temperature (ECT) sensor. Refer to Cooling System Draining and Filling (Static Fill) or Cooling System Draining and Filling (Vac N Fill) .
  2. Disconnect the engine wiring harness electrical connector (1) from the ECT sensor electrical connector.
  3. Remove the ECT sensor electrical connector from the camshaft cover.
    4. CAUTION: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.
  4. Using the J 45861  (2), carefully remove the ECT sensor from the cylinder head. See Special Tools .
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