I need the GM part number for both of the O2 sensors in my '96 SE. I have fixed the coolant leak at the manifold, put in new plugs, new wires (all GM), new pcv valve along with a thorough cleaning of the throttle boddle while disassembled. I am still battling with the tranny guy over the TCC solenoid, but It runs so well now that I am out hunting for things to blow by !!! I am thinking of incorporating some wings to see if it will indeed fly...........in the meantime some part #'* and locations, would be nice................Thanks

Mine'* a bit different, as I only have one O2, and it'* not pre-heated. One should be just before your downpipe, 3 wires, the other should be just after your cat. 3 wires also. One of the 3-wire guys will have to give you the part numbers. Good to see that best running well!