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Installation Procedure

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    Fig 1: View Of HO2S 2
    GM1828224Courtesy of GENERAL MOTORS CORP.
    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.
  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 position 2 HO2S and tighten to 42 N. See Special Tools .m (31 lb ft).
  3. Lower the vehicle.
    4. Fig 2: Identifying CPA Retainer & HO2S 2 Electrical Connectors
    GM1828158Courtesy of GENERAL MOTORS CORP.
  4. Connect the HO2S electrical connector (4) to the engine wiring harness electrical connector (2).
  5. Install the CPA retainer.
  6. Close the hood.
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