Locking Lug Nuts
My '08 GXP (bought used) has a "locking" lug nut on each wheel. I'm guessing it came that way from the factory.
They are round on the outside so of course no standard wrench will work; but on the top surface is a wavy circle meant for the special socket to fit.
The problem is, I don't have the socket. At least it's not in the glove compartment - perhaps it is with the spare tire uquipment under the trunk, but I haven't looked there yet.
Worst case scenario - are replacements available? Could I get one from a GM dealer?