oxygen sensors

[mistercox]

where are the oxygen sensors located?

 

[fbc]

What engine do you have? v6 v8?

If you have the OHV v6 look here:
http://www.explorerforum.com/forums/showthread.php?t=301980

 

[bobflood]

If you have the V8, they are before and after the cats on each side. All the connectors are on top of the transmission; it's a difficult reach but you can get them from underneath.