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Home › Hummer › 2009 › H3T Alpha › Repair and Diagnosis › External Pages › Different variant/trim › Section 1 (Engine Controls And Fuel - 3.7L - Introduction) › Repair Instructions › Heated Oxygen Sensor Replacement - Sensor 2 › Installation Procedure

Installation Procedure

WARNING: This page is about a different variant/trim than selected.
NOTE: Use special anti-seize compound on the HO2S threads. The compound consists of graphite suspended in fluid and glass beads. The graphite burns away, but the glass beads remain, making the sensor easier to remove. New or service sensors already have the compound applied to the threads. If you remove an oxygen sensor and if for any reason you must reinstall the same oxygen sensor, apply the anti-seize compound to the threads before reinstallation.
    Fig 1: View Of HO2S
    GM2046779Courtesy of GENERAL MOTORS CORP.
  1. Coat the threads of the HO2S with the anti-seize compound P/N 5613695, or equivalent if necessary.
    2. CAUTION: Refer to Component Fastener Tightening Caution .
  2. Using the J 39194-B  , install the HO2S (1) into the catalytic converter. See Special Tools .

    Tighten:  Tighten the HO2S to 42 N.m (31 lb ft).

    3. Fig 2: View Of HO2S Electrical Connector
    GM1363915Courtesy of GENERAL MOTORS CORP.
  3. Connect the HO2S electrical connector (3) to the engine wiring harness connector (1).
  4. Lower the vehicle.
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