Installation Procedure

WARNING: This page is about a different variant/trim than selected.

Fig 1: HO2S - Bank 2, Sensor 1

Courtesy of GENERAL MOTORS CORP.

CAUTION: Refer to Fastener Caution .

Install the heated oxygen sensor (HO2S) to the exhaust manifold and tighten to 42 N.m (31 lb ft).
Lower the vehicle.

Fig 2: HO2S Electrical Connector - Bank 2, Sensor 1

Courtesy of GENERAL MOTORS CORP.

Route and attach the wiring as noted during disassembly.
Connect the oxygen sensor electrical connector to the engine wiring harness connector at the rear of the left head.
Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .