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Home >> Chevrolet >> 2004 >> Tracker 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 2.5L (LE8) (Introduction) >> Repair Instructions >> Heated Oxygen Sensor Replacement - Position 2 >> Installation Procedure
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Installation Procedure

    NOTE: Refer to Component Fastener Tightening Notice in Cautions and Notices.
    IMPORTANT: The new HO2S 1 comes with an antiseize coating on the sensor threads. Take precautions in order to prevent the removal of any of the antiseize coating prior to installation. If the sensor was removed and is being reinstalled, an antiseize compound must be applied to the threads before installation.
  1. Install HO2S 2 (1) into the exhaust pipe below the catalytic converter.

    Tighten:  Tighten HO2S sensor to 45 N.m (32 lb ft).

  2. Lower the vehicle.
  3. Connect the HO2S 2 electrical connector.
    4. Fig 1: View Of HO2S 2 Electrical Connector
    GM677336Courtesy of GENERAL MOTORS CORP.


    NOTE: Refer to Component Fastener Tightening Notice in Cautions and Notices.
    IMPORTANT: The new HO2S 2 comes with an antiseize coating on the sensor threads. Take precautions in order to prevent the removal of any of the antiseize coating prior to installation. If the sensor was removed and is being reinstalled, an antiseize compound must be applied to the threads before installation.
  1. Install HO2S 2 (1) into the exhaust pipe below the catalytic converter (1).

    Tighten:  Tighten HO2S sensor to 45 N.m (32 lb ft).

  2. Connect the HO2S 2 electrical connector.
  3. Lower the vehicle.
    4. Fig 1: Locating O2 Sensor
    GM472422Courtesy of GENERAL MOTORS CORP.
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