LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 2004 >> Impala LS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System 3.8L (Introduction) >> Repair Instructions >> Heated Oxygen Sensor Replacement - Position 2 >> Installation Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Installation Procedure

    NOTE: Refer to Fastener Notice in Cautions and Notices.
    IMPORTANT: A special anti-seize compound is used on the oxygen sensor 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 oxygen sensor (4) to the exhaust pipe.

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

  2. Connect the HO2S connector (4) to the HO2S electrical connector (2).
  3. Install the retaining tab (1) to the HO2S electrical connector.
  4. Lower the vehicle.
    5. Fig 1: Installing HO2S (Position 2)
    GM402074Courtesy of GENERAL MOTORS CORP.
scientia non olet · About LEMON Manuals