Question about 1997 Pontiac Grand Prix
I assume you asked, because you haven't looked for them, and never removed one before.
They are always in the exhaust pipe before the converter or most are in the converter.
A 22mm or 7/8" wrench may be what you need
Usually, you use a special O2 Sensor Socket,there are different ones.
Don't replace without testing first
OBD2 Codes--for O2 Sensors --doesn't mean it is bad,could be a vacuum leak.
Posted on Sep 30, 2010
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Posted on Jan 02, 2017
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