2000 buick century wiring harness | eBay Find great deals on eBay for 2000 buick century wiring harness. Shop with confidence. 2000 Buick Century OE Wiring Harnesses & Stereo Adapters Buick Century 2000, Aftermarket Radio Wiring Harness by Metra®, with OEM Plug. For aftermarket stereo. Metra preassembled wiring harnesses can make your car stereo installation seamless, or at least a lot simpler.