GM 5613719 Sensor Asm,Oxygen

The oxygen sensor is a screw-in type sensor located in the exhaust manifold on L4 engines and in the exhaust pipe in V6 engines. The sensor may be difficult to remove when the engine is cold, so the operation is best done with the engine at operating temperature. On V6 models, raise the front of the car and support it on jack stands for working clearance. On L4 models, remove the air cleaner. Remove the electrical connector from the oxygen sensor. Apply a penetrating oil to the threads of the oxygen sensor and allow it to soak in for about 5 minutes. Carefully unscrew the sensor and remove it. Be careful that you do not damage the threads in the exhaust manifold/pipe while removing the sensor. Coat the threads on the new sensor completely with an anti-seize compound and install it. Carefully torque the sensor to 30 ft-lb (4.1 m-kg). Reconnect the electrical connector to the sensor. On L4 models reinstall the air cleaner, and on V6 models lower the car to the ground. Whenever the oxygen sensor is replaced the 'sensor' flag in the instrument panel must be reset.