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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 466 (Engine Controls/Fuel - 5.3L, 6.0L, 6.2L - Repair Instructions) >> Repair Instructions >> Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (1500 Series) >> Removal Procedure

Removal Procedure

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CAUTION:

Refer to Fastener Caution .

    Fig 1: View Of Left Front HO2S Electrical Connector Clip & Engine Wiring Harness Electrical Connector
    GM1704004Courtesy of GENERAL MOTORS COMPANY
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Unbolt the front propeller shaft from the front differential, if equipped with four wheel drive (4WD). Refer to Front Propeller Shaft Replacement .
  3. For vehicles equipped with a 4L60-E/4L70-E automatic transmission perform the following steps, for vehicles equipped with a 6L80-E automatic transmission proceed to step 7.
  4. Remove the connector position assurance (CPA) retainer.
  5. Disconnect the engine wiring harness electrical connector (2) from the HO2S.
  6. Remove the HO2S electrical connector clip (1) from the fuel line clip.
    7. Fig 2: View Of Engine Wiring Harness Electrical Connector Clip & Electrical Connector
    GM1704002Courtesy of GENERAL MOTORS COMPANY
  7. Remove the CPA retainer (2).
  8. Remove the engine wiring harness electrical connector clip (1) from the fuel line clip.
  9. Disconnect the engine wiring harness electrical connector (3) from the HO2S.
    10. Fig 3: View Of Catalytic Converter Assembly HO2S's
    GM1704008Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Excessive Force and Oxygen Sensor Caution .

  10. Remove the HO2S (1 or 2).
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