Review on 📻 GM Genuine Parts 15264469 M6 X 1.0-6H Thread Radio Antenna: Reliable Replacement for Optimal Reception by Dan Germain

This is factory, and the black base you see in the picture is a tool for installation and removal. After tightening the antenna, remove the tool and store in your car's glove box or console. When you go to a car wash, pop a car cover, or park your car in one of those fancy places that turn your antenna into bunny ears, use a tool to remove the antenna and hold it together.