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Installation Procedure
NOTE
A special anti-seize compound is used in 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 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.
CAUTION
!
Refer to "Fastener Notice: ".
2. Install the HO2S (2) to the catalytic converter.
Tightening torque
Tighten the sensor to 42 N⋅m (31 lb ft).
Engine Electrical Devices:
3. Connect the HO2S electrical connector (2) to the
engine wiring harness electrical connector.
4. Lower the vehicle.
1C-17
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Troubleshooting
