Yes.
Catalytic converter plugged?
No.
No.
Yes it did.
Yes
Yes
Not normally.
A failed catalytic converter is one of hundreds of parts that can cause the check engine light to be on.
Gas engine, yes.
No, the first catalytic converters installed on GM vehicles was in 1975.
From what I see if it was made in United states yes it needs a converter but if made in Canada no did not come with converter
Incomplete Combustion