Where is oxygen sensor bank 1 sensor 2 located on a 2000 Monte Carlo?

bank 1 means the side of the engine where cylinder 1 is, which should be the front, by the radiator. sensor 2 is the second one you come to if you follow the exhaust manifold from the engine to the back of the car. it will be after the catalytic convertor. it looks like a spark plug, with a small wire coming out and is plugged into the wiring harness. it will be threaded into the exhaust pipe.