I needed a rear bumper cover and had a friend pick one up from his local junkyard. I took the gamble because, no surprise, they are not plentiful out there. Before I go through the time and trouble of shipping it I was trying to confirm if it is an OEM part. Anyone done this before that could point to identifiers? I thought a molded-in "GM" block logo with a part number would be the thing to look for, but he couldn't locate that, nor could I see any other seller who had intentionally or unintentionally put that in a photo . He did find tags inside stating "Nascote Industries" which is a part of "Korte" industries and I see they are a parts manufacturer but I can't tell if they were ever an OEM supplier to GM or strictly an aftermarket maker, and if so of what quality? Any insights would be appreciated.