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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 978 (Engine Controls - 4.3L (Introduction)) >> Repair Instructions >> Heated Oxygen Sensor (HO2S) Replacement Bank 2 Sensor 1 >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra and 2004 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the clip securing the heated oxygen sensor (HO2S) to the engine harness.
  3. Remove the HO2S from the harness clip.
    4. Fig 1: View Of O2 Sensor Harness Routing And Harness Mounting Brackets
    GM664828Courtesy of GENERAL MOTORS CORP.
  4. Remove the connector position assurance (CPA) retainer.
    NOTE: Refer to Heated Oxygen and Oxygen Sensor Notice in Cautions and Notices.
  5. Disconnect the HO2S electrical connector.
  6. Remove the bank 2 HO2S (1).
    7. Fig 2: View Of Bank 1 & 2 HO2S
    GM815044Courtesy of GENERAL MOTORS CORP.
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