GM 12563848
Oxygen Sensor

To replace the 'heated Oxygen Sensor (HO2S)' for bank 1, start by making sure the ignition is off. Carefully disconnect the Oxygen Sensor 1 connector and carefully remove the Oxygen Sensor being careful not to expose it to grease, dirt or any contaminant on the in-line connector, then the louvered end being concerned with no rough handling or dropping the o2s 1 in order to avoid damaging the threads in the Exhaust Manifold/pipe you need to avoid doing any kind of damage or breaking threads in the exhaust in both of them the manifold and the pipe as well until it reaches the temperature of 48c of 120f. While installing the new or service Oxygen Sensor insert a special anti-seize compound having liquid graphite and glass bead composition should be applied to the threads if required since this will make it easy during the next removal process. Mount the Oxygen Sensor and tighten 41 n.m (30 lb ft) and then reconnect the o2s 1 connector.

You need to lift the vehicle before proceeding with HO2S Bank 1 Sensor 2 replacement. Remove the connector that connects to the HO2S. The HO2S should be removed using the Oxygen Sensor Wrench (J 39194-B). The new oxygen sensor threads must receive a coating of anti-seize compound GM P/N 5613695 followed by its installation. GM P/N 5613695 contains both liquid graphite and glass beads to make removal easier. The HO2S requires installation using the Oxygen Sensor Wrench (J 39194-B) until it reaches a torque value of 42 N.m (31 lb ft). Lastly connect the HO2S harness connector while lowering the vehicle.

A special anti-seize compound, which consists of liquid graphite and glass beads.

In the engine compartment.

Reconnect the O2S 1 connector.

Install the HO2S using the Oxygen Sensor Wrench (J 39194-B) and tighten it to 42 N.m (31 lb ft).

It consists of liquid graphite and glass beads to facilitate future removal.

Disconnect the connector for the HO2S.