I ran out to the garage to see if I might still have the old sensor and I did. There are four wires, the plastic connector on the O2 end goes to the outside of the plastic connector on the wiring harness and the wire connectors are "male". Does this help any?

Boognish, before anybody asks, I am NOT going senile Just don't plan on changing that sucker until we get this straightened out. Considering what we've found out so far, my book may be wrong, but I want confirmation from Deathrat before we say for sure. I'm glad we figured this out.

Al, while you're at it, can you confirm all the part numbers in that article? It'* listed under specs!

After reading all this, I'm a little confused now on what were after! Which car'* O2 sensor are we looking for again? Position 1 or Position 2? Verify which application for proper O2 sensors? Let me know tonite & I'll do it while at work tomorrow AM!

Al, O2 #1, in the rear exhaust manifold, 97 is the year. My book apparently has the wrong part number!

My book says that 97 and 00 up don't use the same sensor! What the hell is going on here?

The VIN is G2HX52KXVH263751, or something thereabout. I think all the numbers made it up on screen. Stupid wireless keyboard with ever-weakening batteries.

Ok, it'* time for everyone who'* done the O2 recently to sound off. Double check those numbers in Techinfo against what actually works. We need to verify!

Listen to the man. I'm only meaning to buy one more sensor.

We need 8 digit part numbers. Where'd those come from?

Just to verify, the GM #25312203 is what I used to replace the O2 in the rear exaust manifold on my 1997 SSEi. It was the same in every way as the old one except new.