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Installation Procedure

WARNING: This page is about a different variant/trim than selected.
NOTE: A special anti-seize compound is used on the HO2S threads. The compound consists of a liquid graphite and glass beads. The graphite will burn away but the glass beads will remain, making the sensor easier to remove. New or service sensors already have the compound applied to the threads. If the sensor is removed and is to be reinstalled, the threads must be coated with an anti-seize compound before reinstallation.
    Fig 1: Identifying HO2S
    GM1593747Courtesy of GENERAL MOTORS CORP.
  1. If reinstalling the old HO2S, coat the threads with anti-seize compound GM P/N 12377953 or equivalent.
    2. CAUTION: Refer to Fastener Caution .
  2. Using the J 39194  , install the HO2S (2).

    Tighten:  Tighten the HO2S to 41 N.m (30 lb ft).

  3. Lower the vehicle.
    4. Fig 2: Identifying CPA Retainer & HO2S Electrical Connector
    GM1592538Courtesy of GENERAL MOTORS CORP.
  4. Connect the HO2S electrical connector (3).
  5. Install the CPA retainer.
  6. Close the hood.
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