TrailBlazer 2WD V8-5.3L (2007)
Notice: Refer to Component Fastener Tightening Notice.
Important: If the HO2S sensor is connected to the main wiring harness during installation. Rotate the HO2S sensor several turns
counterclockwise before threading the HO2S sensor into the catalytic converter. This action of initially reverse winding of the pigtail
wires will prevent a condition where the HO2S sensor pigtail wires become severely twisted or binding once the HO2S sensor is installed
into the catalytic converter.
11. Install both front HO2S sensors (1) to the catalytic converter.
Tighten the sensor to 42 N.m (31 lb ft).
12. Install both rear HO2S (2) to the catalytic converter.
Tighten the sensor to 42 N.m (31 lb ft).
13. Lower the vehicle.
