Upgrade your driving experience with the 1977 Buick Fullsize/Riviera O.E.M. Headlight Dimmer Switch. Designed for seamless compatibility and durability, this switch ensures optimal performance of your vehicle's lighting system. Say goodbye to flickering lights and unreliable switches; our headlight dimmer switch is engineered to provide smooth transitions and dependable functionality, making it a superior choice for your classic Buick.