O2 sensor location

2004 Chevrolet K1500 5.3L

Where is the bank 1 sensor 2 located?

I just want to say thanks for you information on the O2 sensor location. I had heard conflicting stories. Some said that bank 1 was the bank that the number 1 cyl. Was located on. However there was only 1 sensor on that side at the manifold, then the exhaust pipe crossed over and hook up to the right bank. On the passenger side there three. 1 at the manifold, 1 before the cat, 1 after the cat. So if I understood you correctly then the sensor located at bank 1 one sensor 2 that would be the sensor on the passenger side(right bank) before the converter.

Thanks for all your help.