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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Engine Controls - 4.3L - Introduction (2 Of 2)) >> Repair Instructions >> Heated Oxygen Sensor (HO2S) Replacement Bank 1 Sensor 2 >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the heated oxygen sensor (HO2S) connector from the crossmember, if equipped with a manual transmission and 2-wheel drive (2WD).
  3. Disconnect the connector position assurance (CPA) retainer.
    NOTE: Refer to HEATED OXYGEN AND OXYGEN SENSOR NOTICE in Cautions and Notices.
  4. Disconnect the HO2S electrical connector from the harness (2).
    Fig 1: Disconnecting HO2S Electrical Connector
    GM772343Courtesy of GENERAL MOTORS CORP.
  5. Remove the HO2S connector from the crossmember, if equipped with a automatic transmission and 2WD.
    Fig 2: Removing HO2S Electrical Connector From Crossmember (2WD)
    GM815070Courtesy of GENERAL MOTORS CORP.
  6. Disconnect the CPA retainer.
  7. Disconnect the HO2S electrical connector from the harness.
  8. Remove the HO2S connector from the crossmember, if equipped with 4-wheel drive (4WD).
    Fig 3: Removing HO2S Electrical Connector From Crossmember (4WD)
    GM815068Courtesy of GENERAL MOTORS CORP.
  9. Disconnect the CPA retainer.
  10. Disconnect the HO2S electrical connector from the harness.
  11. Remove the bank 1 HO2S (2).
    Fig 4: Removing HO2S
    GM815044Courtesy of GENERAL MOTORS CORP.
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