XL-7 2WD V6-3.6L (2007)
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 (1) to the exhaust manifold.
Tightening torque
Tighten the sensor to 42 N.m (31 lb.ft).
3. Connect the engine wiring harness electrical connector (3) to the HO2S electrical connector (2).
4. Install the HO2S electrical connector retainer to the camshaft cover.
5. Install the fuel injector sight shield, if necessary. Refer to [Fuel Injector Sight Shield Replacement].
Heated Oxygen Sensor Replacement - Bank 1 Sensor 2
Heated Oxygen Sensor Replacement - Bank 1 Sensor 2
