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Home >> Chevrolet >> 2004 >> Impala LS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System 3.8L (Introduction) >> Repair Instructions >> Heated Oxygen Sensor Replacement - Position 1 >> Installation Procedure
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Installation Procedure

    NOTE: Refer to Fastener Notice in Cautions and Notices.
    IMPORTANT: A special anti-seize compound is used on the oxygen sensor (1) threads. New service sensors should already have the compound applied to the threads. Coat the threads of a reused sensor with anti-seize compound P/N 12377953 or equivalent.
  1. Install the rear oxygen sensor in the right exhaust manifold.

    Tighten:  Use the J 39194  to tighten the HO2S to 41 N. See Special Tools and Equipment .m (30 lb ft).

  2. Connect the HO2S electrical connector (4) to the wiring harness connector (3).
  3. Install the HO2S electrical connector (4) to the fuel injector sight shield bracket (1).
  4. Install the HO2S electrical CPA retainer.
  5. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical-3.8L.
    6. Fig 1: Installing HO2S (Position 1)
    GM371512Courtesy of GENERAL MOTORS CORP.
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