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There are at least six O2 sensors in that car. I don't know where all of them are, but you could just follow the wires. It will lead you to them. I would bring the car into a chevy dealing and let them check it out. It could be something else entirely.
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You're reading I have a 2000 Chevy Blazer and the check engine light came on. I have replaced the rear o2 sesor, but the check engine light is still on,what is causing the to stay on?
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