They are all threaded into the exhaust system at various points.
No, they will need replaced if defective.
A 1998 Chevy S10 Blazer has a total of two oxygen sensors. One is used for the upstream and one for the downstream.
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That vehicle has several O2 sensors and they are all threaded into the exhaust system at various points.
I just changed the one on my wife's 1998 blazer last week. It is located on the passenger side in the exhaust manifold. I used a open end wrench with a pipe to break it free. Hope this helps.
They are screwed into the exhaust system.
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The 1998 Chevy Astro van is equipped with two oxygen sensors. One is located before the catalytic converter (upstream), and the other is located after the catalytic converter (downstream). These sensors monitor the oxygen levels in the exhaust gases to optimize engine performance and emissions.
three
yes, it does have Oxygen sensors