I finally crawled under my truck to get a look at the sensor.

Getting the pipe end of the sensor out is no problem, but where is the other end? And how in the world do you get to it? It seemed out of reach to me. I really don't want to bring this somewhere to have it done since it's such a simple procedure...

 

Dang, if you would have posted this yesterday I could have gotten a good look while my truck was up on the lift this morning. But I did just crawl under it and the O2 sensor after the cat is just right there, easy to find, the plug was attached to the topside of the frame there, about 12 inches or so of wire looked like.