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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1311 (Engine Controls And Fuel - 4.8L, 5.3L, 6.0L, 6.2L - Introduction (1 Of 2)) >> Repair Instructions >> Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (2500 Series) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Left Front HO2S Electrical Connector Clip & Engine Wiring Harness Electrical Connector
    GM1704004Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to Heated Oxygen and Oxygen Sensor Caution
  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 CORP.
  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: Identifying Exhaust System Components
    GM1851870Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to Excessive Force and Oxygen Sensor Caution
  10. Remove the HO2S (1).
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