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the o2 sensor for a 1990 Chevy Lumina euro 3.1l v6 is on the down pipe for the exaust just below the manifold on the back side of the engine, by the firewall

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โˆ™ 2011-09-13 11:01:27
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Q: Where is the O2 sensor in a 1990 Chevy Lumina Euro 3.1?
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