There are several 02 sensors on that vehicle depending if it's a 4 or 6 cylinder and they are all threaded into the exhaust system at various points.
After the catalytic converter.
Yes.
It might be in the diagram of parts and places, if comes with it.
That would be the sensor after the catalytic converter.
Usually a problem in the emission control system i.e. 02 sensor,
Need to know which engine the 02 S10 has.
The 02 Chevy S10 with a 4 cylinder or a 6 cylinder does not have a timing belt.
try lmctruck.com all S10 2 wheel drives are the same from 82 to 02
All O2 sensors are threaded into the exhaust system at various points.
It's on the throttle body, opposite side of the throttle cable.
From my experience, the only oxygen sensor that works correctly is the one from the dealer.
It is screwed into the exhaust pipe close to were the pipe bolts to the engine. It is about 3 to 4 inches long with an electric wire pluged to it.