Hey all, wifes Yukon threw out a 0141 code today which from what I can tell is an O2 sensor gone bad. Does anyone know which one it is? I think there is 4 under there but not sure, it's pitch black out there and I'm on my way to bed. :p:

That would be bank 1 sensor 2. Which is the post cat sensor in the pipe coming from the driver side.

Cool! That was what I thought but wanted to be sure. Thanks a bunch!