bought a cat at the local auction

My yard calls it just GM, I know that comes off blazers and s10s with 4.3s but probably others. It's not a four dot even tho it has four dots. A four dot is four dots in a diamond pattern and are not as thick as this one. Had one last week $95 at my yard, probably 100 to 120 with a core buyer

Edit. I will say the double GM makes sense tho I've never seen that term on any of the core buyer sites. That's a heavy converter and these are pretty thick