By law, yes.
Not legally
does a 1976 3/4 ton chevy truck have to have converters on it
Walk outside, get down on your knees, look under the truck, and count how many converters you see.
It can be, but it is illegal to remove a catalytic converter.It can be, but it is illegal to remove a catalytic converter.
If the vehicle is a 2005 and it has the 4.0 engine, it has 2 catalytic converters.
There are two, a left and right.
V6 and V8 have 1 V10 has 2
YES, some did.
Bad O2 sensors will cause this. I just went through the same thing with my 99 silverado. also had to have the catalytic converters replaced. Cost $650
Walk outside, find your truck, crawl under it and look up and count the number of converters you see. You now have your answer.
It is located in the catalytic converter
No, it's illegal to remove the converter. Besides the engine will not run correctly with the converter removed.