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HOMESERVICE MANUALSBUICK2006TERRAZA CXL, 3.5 L, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 210 (ENGINE CONTROL SYSTEM - 3.9L - INTRODUCTION (2 OF 2))REPAIR INSTRUCTIONSHEATED OXYGEN SENSOR REPLACEMENT - POSITION 2INSTALLATION PROCEDURE
2006 Buick Terraza CXL, 3.5 L, AWD

Installation Procedure

2006 Buick Terraza CXL, 3.5 L, AWDSECTION Installation Procedure
WARNING: This page is about a different car, the 2006 Chevrolet Monte Carlo and 2006 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: A special anti-seize compound is use on the HO2S threads. The compound consists of liquid graphite and glass beads. The graphite tends to burns 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.
    Fig 1: Installing The HO2S To The Catalytic Converter
    GM1618528Courtesy of GENERAL MOTORS CORP.
  1. If re-installing the old sensor, coat the threads with the anti-seize compound P/N 12377953, or equivalent.
    NOTE: Refer to Fastener Notice .
  2. Install the HO2S to the catalytic converter.

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

    3. Fig 2: Connecting The HO2S Electrical Connector
    GM1618526Courtesy of GENERAL MOTORS CORP.
  3. Connect the HO2S electrical connector (3).
  4. Install the CPA retainer (1).
  5. Install the HO2S electrical connector clip to the heat shield.
  6. Lower the vehicle.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.