o2 sensor

Can anyone tell me where bank1 sensor3 is on my 1997 chevy blazer 4X4....i know there are three O2 sensors...two under the passenger and one under the driver....so please someone help me....thanks for all replys...

buckeye, if you can't find them on your own you won't be ablt to change them on your own.
They always require heat, and lots of it.

However to answer your question, just pop the hood ansd look for a sensr (with wires going to it) located in the exhaust pipes.
You might have to crawl underneath to fine them.

The answer is the one behind the cat conv (rear most). See:
http://www.automotiveforums.com/vbulletin/showthread.php?t=555617&highlight=sensor+bank