I was told by the seller that they're from a Camaro but I know I can’t completely trust a swap meet seller. I did however find some tags on the bottom.
The driver's side says CHEV GRAPH 6WAY Piece : 16778966 CSN : 316210
The passenger side says CHEV GRAPH 2WAY Piece : 16778970 CSN : 316210
HouseCallAuto 10/9/2012Bring those part numbers to a GM dealer parts dept and I would bring them coffee and donuts too before I ask them to look up info on those part numbers. They are under no obligation to so you have to keep their interest.