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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 2 Sensor 1 >> 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.
CAUTION: Refer to Heated Oxygen Sensor Resistance Learn Reset Caution .
    Fig 1: Heated Oxygen Sensors Electrical Connector
    GM1883806Courtesy of GENERAL MOTORS CORP.
  1. Remove the intake manifold cover, if necessary. Refer to Intake Manifold Cover Replacement .
  2. Remove the connector position assurance (CPA) retainer.
  3. Disconnect the engine wiring harness electrical connector (3) from the heated oxygen sensor (HO2S) electrical connector (2).
  4. Remove the HO2S rosebud clip from the oil level indicator tube tab (1).
    5. Fig 2: 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.
  5. Remove the HO2S (1). Use the J 39194-B  , if necessary. See Special Tools .
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