The down stream oxygen sensor is screwed into the exhaust pipe behind the catalytic converter.
The 5.2L has two oxygen sensors.
2 sensors
Two.
THERE ARE 2
2
Four
It has two.
It has four.It has four.
It only has 4
Two sensors, and replace them.
Counterclockwise to remove, clockwise to tighten.
You can not eliminate the oxygen sensors if you ever want the engine to run properly.