Where is rear heated oxygen sensor bank 2 located on 1997 GMC Sierra?

On a 1997 GMC Sierra, the rear heated oxygen sensor for bank 2 is located on the exhaust system, specifically after the catalytic converter on the passenger side. It monitors the exhaust gases to help manage emissions and fuel efficiency. To access it, you'll typically need to crawl underneath the vehicle and look for the sensor threaded into the exhaust pipe.