The GMC Sprint was made from 1971 to 1977 as the GMC cousin of the Chevrolet El Camino. After 1977, it was re-badged as a Caballero; that was produced until 1987. Both were co-models of the Ford Ranchero utility coupe pickup.
This 1977 two tone model, with added custom wheels, is presented as a relaxed view 3d stereograph.
Note - this may be a 1976, as that was that year that stacked rectangular headlights were first used.