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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 947 (Engine Controls - 4.8L, 5.3L, & 6.0L (Introduction)) >> Repair Instructions >> Heated Oxygen Sensor (HO2S) Replacement Bank 1 Sensor 2 >> 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. If equipped, disconnect the fuel composition sensor electrical connector.
  3. Disconnect the connector position assurance (CPA) retainer.
    NOTE: Refer to Heated Oxygen and Oxygen Sensor Notice in Cautions and Notices.
  4. If equipped with a fuel composition sensor, remove the heated oxygen sensor (HO2S) electrical connector from the fuel line clip.
  5. If equipped with a 4.8L or 5.3L engine, disconnect the HO2S electrical connector (2).
    6. Fig 1: View Of O2 Sensor Harness Routing
    GM664951Courtesy of GENERAL MOTORS CORP.
  6. If equipped with a 6.0L engine, disconnect the HO2S electrical connector (2).
    7. Fig 2: View Of Transmission & HO2S Sensor Electrical Connector
    GM665040Courtesy of GENERAL MOTORS CORP.
  7. Remove the HO2S.
    8. Fig 3: View Of Oxygen Sensors
    GM664954Courtesy of GENERAL MOTORS CORP.
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