o2 sensors location

[stoneymonk]

Where are the o2 sensors located on a 95 lumina with a 3.4 motor.

[robertisaar]

rear manifold if i'm not mistaken...

and is there more than 1?

[stoneymonk]

rear manifold if i'm not mistaken...

and is there more than 1?

Thanks Rob,i always thought there were two one upstream and one downstream.

[robertisaar]

for 95 there should only be 1: before the cat. 96 and up should have 2. 1 before, 1 after