Genuine Delco floor-mounted headlight dimmer switch, part D809 / GM #1997043. This is New Old Stock — never installed, still in its original Delco box with factory labeling intact (box shows some age/shelf wear as expected for old stock).

Fits a wide range of 1960s–1980s GM vehicles including Chevrolet, GMC, Buick, Oldsmobile, Pontiac, and Cadillac models, and is a well-known correct-fit part for 1963–1976 Corvettes. Also cross-references to some International Harvester trucks. Please verify fitment against your vehicle’s original part number before purchasing