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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Engine Controls - 4.3L - Introduction (2 Of 2)) >> Repair Instructions >> Heated Oxygen Sensor (HO2S) Replacement Bank 1 Sensor 2 >> Installation Procedure

Installation Procedure

WARNING: This page is about a different variant/trim than selected.
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 old sensor is to be reinstalled, the threads must have anti-seize compound applied before the reinstallation.
  1. If reinstalling the old HO2S, 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 bank 1 HO2S (2).
    Fig 1: Installing HO2S
    GM815044Courtesy of GENERAL MOTORS CORP.

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

  3. Connect the HO2S electrical connector to the harness.
  4. Connect the CPA retainer.
  5. Install the HO2S connector to the crossmember, if equipped with 4WD.
    Fig 2: Installing HO2S Electrical Connector To Crossmember (4WD)
    GM815068Courtesy of GENERAL MOTORS CORP.
  6. Connect the HO2S electrical connector to the harness.
  7. Connect the CPA retainer.
  8. Install the HO2S connector to the crossmember, if equipped with a automatic transmission and 2WD.
    Fig 3: Installing HO2S Electrical Connector To Crossmember (Automatic 2WD)
    GM815070Courtesy of GENERAL MOTORS CORP.
  9. Connect the HO2S electrical connector to the harness (2).
    Fig 4: Connecting HO2S Electrical Connector
    GM772343Courtesy of GENERAL MOTORS CORP.
  10. Connect the CPA retainer.
  11. Install the HO2S connector to the crossmember, if equipped with a manual transmission and 2WD.
  12. Lower the vehicle.
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