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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1958 (Engine Controls And Fuel - 3.6L (Ly7) - Introduction) >> Repair Instructions >> Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: A special anti-seize compound is used in the HO2S threads. The compound consists of liquid graphite and glass beads. The graphite tends to burn away, but the glass beads remain, making the sensor easier to remove. New, or service replacement sensors already have the compound applied to the threads. If the sensor is removed from an exhaust component and if for any reason the sensor is to reinstalled, the threads must have anti-seize compound applied before the reinstallation.
    Fig 1: Identifying HO2S & Catalytic Converter
    GM1836222Courtesy of GENERAL MOTORS CORP.
  1. If reinstalling the old sensor, coat the threads with anti-seize compound GM P/N 12377953, or equivalent.
    2. CAUTION: Refer to Fastener Caution .
  2. Install the HO2S (1) to the exhaust manifold. Tighten the sensor to 42 N.m (31 lb ft).
    3. Fig 2: HO2S Electrical Connector
    GM1888732Courtesy of GENERAL MOTORS CORP.
  3. Connect the engine wiring harness electrical connector to the HO2S electrical connector (1).
  4. Install the HO2S electrical connector retainer to the harness clip (7).
  5. Install the CPA retainer.
  6. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement (LY7) .
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