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HOMESERVICE MANUALSBUICK2006TERRAZA CXL, 3.5 L, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 1 (ENGINE CONTROLS - 3.9L - INTRODUCTION (2 OF 2))REPAIR INSTRUCTIONSHEATED OXYGEN SENSOR 1 REPLACEMENTINSTALLATION 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 variant/trim than selected.
IMPORTANT: special anti-seize compound is used on the HO2S threads. The compound consists of liquid graphite and glass beads. The 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.
    Fig 1: View Of HO2S 1
    GM1087793Courtesy of GENERAL MOTORS CORP.
  1. If re-installing the old sensor, coat the threads with anti-seize compound P/N 12377953 or equivalent.
    2. NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  2. Install the HO2S to the exhaust manifold.

    Tighten:   Tighten the ECT sensor to 42 Nm (31 lb ft).

    3. Fig 2: Locating HO2S connector
    GM1679874Courtesy of GENERAL MOTORS CORP.
  3. Connect the engine harness electrical connector (4) to the HO2S connector.
  4. Install the CPA retainer.
  5. Install the HO2S electrical connector to the ignition coil bracket.
  6. Lower the vehicle.
  7. Install intake manifold cover. Refer to INTAKE MANIFOLD COVER REPLACEMENT .
RENDER: 1.0x

NO RELATED

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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.