2000 Denali Oxygen Sensor

I have multiple error codes relating to O2 Bank 2 Sensor 1. Can anyone tell me where this sensor is located?

DTC's tell you what circuit a fault was detected in. They do not tell you to replace a part. DTC's must be diagnosed and repaired, (one at a time) in the order they are retrieved. Then clear the memory and perform a drive cycle to confirm the repair. http://www.obdii.com/drivecycle.html If a DTC is set during or after the drive cycle is complete, repeat the process. Bank 2 sensor 1 is the upstream sensor, (closest to the exhaust manifold) on the passenger side.