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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 357 (Engine Controls And Fuel - Hybrid (LZ1) - Repair Instructions) >> Repair Instructions >> Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2011 GMC Yukon, 2011 Chevrolet Tahoe, and 2011 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

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 the reinstallation.

    Fig 1: Exhaust And HO2S Sensors
    GM1960379Courtesy of GENERAL MOTORS CORP.
    CAUTION:

    Refer to Fastener Caution .

  1. If reinstalling the old sensor, coat the threads with anti-seize compound GM P/N 12377953, or equivalent.
  2. Install the HO2S (4).

    Tighten 

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

    3. Fig 2: Connector Position Assurance (CPA) Retainer
    GM1960373Courtesy of GENERAL MOTORS CORP.
  3. If equipped with 4WD perform the following steps, if equipped with 2WD proceed to step 6.
  4. Connect the HO2S electrical connector (4) to the engine wiring harness electrical connector (3).
  5. Install the CPA retainer (2).
    6. Fig 3: HO2S And Components
    GM1960375Courtesy of GENERAL MOTORS CORP.
  6. Connect the HO2S electrical connector (3) to the engine wiring harness electrical connector (5).
  7. Install the CPA retainer (2).
  8. Lower the vehicle.
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