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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1957 (Engine Controls And Fuel - 3.5L - Introduction) >> Repair Instructions >> Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Heated Oxygen Sensors
    GM1883810Courtesy of GENERAL MOTORS CORP.
    CAUTION: The oxygen sensor may be difficult to remove when the engine temperature is below 48°C (120°F). Excessive force may damage threads in the exhaust manifold or the exhaust pipe.
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the connector position assurance (CPA) retainer.
  3. Disconnect the heated oxygen sensor (HO2S) electrical connector from the engine wiring harness electrical connector.
  4. Remove the HO2S (3). Use the J 39194-B  , if necessary. See Special Tools .