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Home >> Oldsmobile >> 2004 >> Bravada AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1742 (Engine Control System - 4.2L - Introduction) >> Repair Instructions >> Engine Coolant Temperature (ECT) Sensor Replacement >> Removal Procedure

Removal Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2005 Isuzu Ascender, 2005 GMC Envoy XUV, 2005 GMC Envoy XL, 2005 GMC Envoy, and 2005 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.
  1. Turn the engine OFF.
    2. CAUTION: Refer to Battery Disconnect Caution in Cautions and Notices.
  2. Disconnect the negative battery terminal.
  3. Drain coolant below the level of the ECT sensor. Refer to Draining and Filling Cooling System (LL8) or Draining and Filling Cooling System (LM4) in Engine Cooling.
    4. Fig 1: Locating ECT Sensor Electrical Connector
    GM726805Courtesy of GENERAL MOTORS CORP.
  4. Disconnect the ECT sensor electrical connector (1).
  5. Remove the drive belt and the generator. Refer to Generator Replacement (4.2L Engine) or Generator Replacement (5.3L Engine) in Engine Electrical.
    6. Fig 2: Locating ECT Sensor
    GM726806Courtesy of GENERAL MOTORS CORP.
  6. Carefully remove the ECT sensor (1).
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