Silverado SS AWD V8-6.0L VIN N (2003)
27. If equipped with a 6.0L or 8.1L engine, remove the oxygen sensor if the muffler is being replaced.
Installation Procedure
Notice:
Refer to Exhaust System Inspection.
1. If equipped with a 6.0L or 8.1L engine, and the muffler was replaced re-install the old oxygen sensor.
2. Apply anti-seize compound GM P/N 12377953 or equivalent to the threads of the old oxygen sensor.
Notice:
Refer to Fastener Notice in Service and Precautions.
See: Service Precautions/Vehicle Damage Warnings/Fastener Notice
3. Install the oxygen sensor.
Tighten the sensor to 42 Nm (31 ft. lbs.).
Important: Apply lubricant to the insulators to aid in installation.
