K 1500 Suburban 4WD V8-5.3L VIN Z Flex Fuel (2003)
7. Remove the HO2S.
NOTE: Refer to Excessive Force and Oxygen Sensor Notice in Service Precautions See: Service Precautions/Excessive Force and Oxygen Sensor
Notice.
INSTALLATION PROCEDURE
IMPORTANT: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.
1. If reinstalling the old sensor, coat the threads with anti-seize compound GM P/N 12377953, or equivalent.
NOTE:Refer to Component Fastener Tightening Notice in Service Precautions See: Service Precautions/Vehicle Damage Warnings/Fastener Notice.
2. Install the HO2S.
Tighten
Tighten the sensor to ................................................42 N.m (31 lb ft).
