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I removed the old oxygen sensor and tried to put in the new one, but it won't

(1991 GMC 1500 Pickup)
in Mesquite, TX on November 14, 2012
fit????Why and what do I do now since it won't pass inspection because h20 is too high??
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Popular Answer
on November 14, 2012
Threads damaged.Get appropriate size tap and re-thread.
on November 14, 2012
wrong part
on May 25, 2015
Someone sold you the wrong sensor...Ask for a upstream if the sensor is on the manifold...
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