An ACDelco GM Original Equipment Radio Antenna Extension Cable connects your radio antenna to your vehicle's entertainment system, and is a GM-recommended replacement for your vehicle's original component. They are also known as coaxial cables. Coaxial cables are used to conduct Radio Frequency signals and are shielded from outside electrical interference. Special connectors are used to connect the cables to components. These original equipment radio antenna extensions have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.