They are about 3 to 4 inches long with an electric wire coming out of the end of them and you can find them screwed into the exhaust system/pipes. Start looking up by the engine and work your way back to the muffler and you will see them. I believe that year had 2 of them.
That year has 2 oxygen sensors.
My 1995 Ford Explorer with 4.0 L OHV has 2 oxygen sensors (Helpfull)
It has 1
how many oxgen sensors on a 1995 millenia
two
no xoygen sensors on diesels
They are screewed into the exhaust system/Pipes. There will not be any after the muffler.
That year used ONLY 2 sensors and there up close to the engine in the exhaust system/pipes.
where are the airbag sensors on a 2006 silverado
One
two
All O2 sensors are threaded into the exhaust system at various points.