Cat or no Cat

[turner16]

I'm struggling hard to find out if my truck came with a cat or not.
My parts guys all say if I had a dual out on the muffler then I would have had a cat. Of course all the original stuff is gone. GM dealer can't check a 13 digit VIN (to old). Another said all 1500's had them some 2500's hit and miss?
Mine is a 2500. Any way to find out? My enviro cops must know but I can't seem to contact them. Of course they will find me the second its on the road.

Any help with emissions would