An ACDelco GM Original Equipment Radio Antenna Base is the foundation of your vehicleâs antenna, and is a GM-recommended replacement for your vehicleâs original component. The radio antenna base performs several functions: provide the antenna cable connection interface, provide the grounding point for the antenna ground plane, and mechanically support the mast and seal out water from the vehicle interior. These original equipment radio antenna bases have been manufactured to fit your specific GM vehicle, providing the same performance, durability, and service life you expect from General Motors.Get the GM quality you know and trust with ACDelco GM Original Equipment Electronics. Stay with the parts brand your vehicle came with and get peace of mind that the fit, form, and function is up to the high standards and specifications of General Motors. ACDelco GM Original Equipment Electronics are engineered for virtually every make and model of GM car, light duty truck, and sport utility vehicle. From key fobs, tire pressure sensors and components, antennas and components, amplifiers, and cables, ACDelco has your vehicleâs electronic equipment needs covered.