Upstream O2 sensor locations - '98 Tahoe

[newyorkin]

I can see the drivers side sensor in the manifold easily, but can't see the pass side sensor. Is it in the manifold, or further down the pipe?
The manual is real helpful, it says there are two upstream sensors.

Anyone know?

 

[daleearnhardt01]

Pretty sure its further down the pipe, but its been a while since mine has been up on the lift..

 

[newyorkin]

Thanks. I swapped them out a week or two ago. I was looking at the egr pipe I guess, thinking it was the o2 sensor...