Question about 1999 Pontiac Grand Am GT
It's mounted into the exhaust pipe before the catalytic converter(s). It will have a wire pigtail plugged into it. You need an oxygen sensor socket to remove it. Spray the corroded metal mounting area with penetrating lubricant, allow that to work for a few minutes, and carefully remove the sensor by unscrewing it with the socket and ratchet wrench.. It will be fairly tight. Installation is the reverse of removal.
Posted on Feb 15, 2012
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Posted on Jan 02, 2017
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