ive got some part numbers for the oxygen sensors (AC DELCO) for my '97TA on a website. i'm not exactly sure which ones i need and where each one goes. if someone wouldnt mind helping me with this, it would be appreciated. thanks.
dave

PART #:

AFS75 (POSN 1)
SG236 (IT SAYS "REQUIRES TWO" AND DOESNT GIVE POSN #)
AFS97 (POSN 2, POSN 3)
SG277 (DOWNSTREAM SENSOR)

Thanks again

 

PN: 25312184 is the GM part number for the O2 sensors that fit into the exhaust manifold. These are the pre-cat sensors. Your car should have two of them, one in each manifold.

Can't find the PN for the after cat O2's.

JeffA

 

...and those are the ACDelco #AFS75's.