How do you install a oxygen sensor for a 1999 Pontiac grand prix?

Answer 1

I just replaced mine a month ago. There are two sensors, one on the engine and the other is under the car right before the catalytic converter. The one on the engine is next to the rear spark plugs. It's almost on the steering column. Use a slotted socket to allow the socket to go over the wire that comes out. I got my socket at Sears for $15. It's labled as an oxygen sensor socket. For the one under the car you can use a 7/8th (if I remember corectly) wrench to remove it. This is about a 30 minute job.