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Q: I removed the old oxygen sensor and tried to put in the new one, but it won't on 1991 GMC 1500 Pickup

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
fit????Why and what do I do now since it won't pass inspection because h20 is too high??
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
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