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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 973 (Engine Controls - 4.8L, 5.3L, & 6.0L (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, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis 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. Disconnect the connector position assurance (CPA) retainer.
  3. Remove the heated oxygen sensor (HO2S) from the clips
    NOTE: Refer to Heated Oxygen and Oxygen Sensor Notice in Cautions and Notices.
  4. If equipped with a 4.8L or 5.3L engine, disconnect the HO2S electrical connector.
    5. Fig 1: View Of O2 Sensor Harness Routing And Harness Mounting Brackets
    GM664828Courtesy of GENERAL MOTORS CORP.
  5. If equipped with a 6.0L engine, disconnect the HO2S electrical connector.
    6. Fig 2: View Of O2 Sensor, Connector, Harness And Retainers
    GM664781Courtesy of GENERAL MOTORS CORP.
  6. Remove the HO2S.
    7. Fig 3: View Of Oxygen Sensors
    GM664954Courtesy of GENERAL MOTORS CORP.
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