Blackwing16
Seasoned Member
Does anyone know the GM part number for the black lug nuts on the CT4-V Blackwing? I recently placed an order for a set on GM's website and figured everything would be ok, since the order was verified using my VIN and the receipt said they were for a Blackwing. Tried to install them today and they are not the correct size for the studs on the Blackwing. So the part no. 84639994 does not appear to be the correct size or the box I got had the wrong size lug nuts in it to begin with.