The OEM GM LED Headlight Control Module Ballast 5DF011818-20AF is a screw-on headlight ballast designed for AC current type vehicles. With a voltage of 12V, this ballast is specifically manufactured for GM vehicles, featuring an electric ballast design. It is not a vintage part and does not offer universal fitment or enhanced performance. This module is a genuine OE/OEM part with the manufacturer part number 5DF 011 818-20/AF, ensuring compatibility and quality for your vehicle's lighting system. This item is used and buyer is responsible for verifying correct application.