GM 12596327
Oxygen Sensor

Before installing the heated Oxygen Sensor (HO2S) for bank 1 sensor 1 turn off the ignition and detach the ho2s electrical connection before taking out the sensor from its harness bracket. The replacement process becomes simpler if the engine temperature reaches 48°c (120°F). After removing the Catalytic Converter from the system move on to the ho2s extraction. New oxygen sensors require special anti-seize compound on their threads before installation. The original sensor requires gm p/n 5613695 anti-seize compound or a similar product for application. Put the ho2s into position on the Catalytic Converter before applying 40 n.m (30 lb ft) of torque. The vehicle needs to be lowered as you need to connect the ho2s electrical connector to the wiring harness bracket. Once that is done reconnect the ho2s electrical connector.

First replace the heated Oxygen Sensor (HO2S) for bank 2 sensor 2 on the lc3 engine by disassembling the engine sight shield and windshield wiper module while keeping in mind that the sensor exists on the left side of the driver position and resides as the second exhaust sensor from the front toward the rear of the vehicle. Disconnect the Oxygen Sensor electrical connector from engine wiring harness at the back left head position while writing down the connection route and attachment references to recreate the assembly. While supporting the automobile from above disconnect the oxygen detector from its Exhaust Pipe location. When installing the new heated Oxygen Sensor (HO2S) users should mount it to the Exhaust Pipe after applying special anti-seize compound p/n 5613695 or equivalent to threads. Tighten the sensor to 42 n.m (31 lb ft). Follow the wiring steps performed during the disassembly procedure when attaching the wires and drop the vehicle before reuniting the Oxygen Sensor electrical connector with the engine wiring harness at the back of the left head. Afterward, reinstall the windshield wiper module assembly and the engine sight shield.

Tighten it to 40 Nm (30 lb ft).

Removal is easier when the engine temperature is above 48°C (120°F).

Disconnect the HO2S electrical connector, noting that the configuration for bank 2 is similar to bank 1.

New service sensors should already have this compound applied.

Ensure the ignition is turned OFF.

Disconnect the HO2S electrical connector and remove the HO2S wiring harness from the transmission case before taking out the HO2S.

It is located on the right side when seated in the driver's seat and is the sensor closest to the engine.

Reconnect the oxygen sensor electrical connector to the engine wiring harness at the rear of the left head and reinstall the fuel injector sight shield.

Install the HO2S and tighten it to 40 N.m (30 lb ft).