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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Engine Controls - 8.1L - Introduction (2 Of 2)) >> Repair Instructions >> Heated Oxygen Sensor (HO2S) Replacement Bank 1 Sensor 1 >> Installation Procedure

Installation Procedure

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IMPORTANT: A special anti-seize compound is used on 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 be reinstalled, the threads must have anti-seize compound applied before reinstallation.
  1. If reinstalling the old sensor, coat the threads with anti-seize compound GM P/N 12377953, or equivalent.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  2. Install the HO2S (1).
    Fig 1: Installing HO2S
    GM710383Courtesy of GENERAL MOTORS CORP.

    Tighten:  Tighten the sensor 42 N.m (31 lb ft).

  3. Connect the HO2S electrical connector (1).
    Fig 2: View Of Transmission & HO2S Sensor Electrical Connector
    GM665040Courtesy of GENERAL MOTORS CORP.
  4. Connect the CPA retainer.
  5. Lower the vehicle.
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