TWO.
It has 4 and there all screwed into the exhaust system.
4
three
four
One.
It has 4 and they are in the exhaust system.
look under you Chevy and locate the catalytic converter. Your 02 sensors are located before and after the catalytic converter on your muffler. See 1 or 2?
2. one before the cat. converter and one after it, near tailpipe
4 and there all screwed into the exhaust system/pipes.
There are approximately 4 oxygen sensors on a Chevrolet V6 truck. The oxygen sensors can be purchased at any auto parts store such as NAPA.
If it has the 2.2L engine it has two. If it has the 4.3L engine it has three. All O2 sensors are threaded into the exhaust system at various points.