gmc Workshop Repair Guides

GMC Workshop Service and Repair Manuals

Relays and Modules - Computers and Control Systems > < Diagram Information and Instructions|Page 3091
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Oxygen Sensor: Service and Repair

NOTE  The oxygen sensor has a permanently attached pig-tail and connector. This pig-tail should not be removed, since removal will affect proper
operation of the oxygen sensor.

REMOVAL

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Disconnect electrical connector from oxygen sensor.

-

Using suitable wrench, carefully remove sensor from exhaust manifold or pipe.  

Caution

The oxygen sensor may be difficult to remove when engine temperature is below 120°F. Excessive force may damage threads in exhaust manifold
or pipe.

INSTALLATION

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If new sensor is being used, install sensor into manifold or pipe.

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If old sensor is being reused, coat threads with anti-seize compound, Part No. 5613695 or equivalent, then install into manifold or pipe.

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Torque oxygen sensor to 41 N-m (30 lb. ft.), then reconnect electrical connector.

Relays and Modules - Computers and Control Systems > < Diagram Information and Instructions|Page 3091