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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 will have the compound applied to the threads. If a sensor is removed and is to be reinstalled, the threads must have an anti-seize compound applied before installation.
    Fig 1: Identifying HO2S
    GM1593747Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to Fastener Caution .
  1. If reinstalling the old HO2S, coat the threads with anti-seize compound GM P/N 12377953 or equivalent.
  2. Using the J 39194  , install the HO2S (1).

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

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