Chevrolet El Camino SS
The El Camino SS was a unicorn in the auto industry. It was a car-based truck with a powerful V8 engine. The SS model shared many components with the Chevelle SS. The problem with the El Camino SS was that it didn’t gain the popularity or notoriety GM hoped for. The Chevrolet El Camino SS was a notable muscle car for several reasons and its unique styling set it apart from everything else on the market (via Hemmings).
The unique design of the car only resonated with a very small audience. The fact that it could only seat three also prevented many qualified buyers from opting for one. The El Camino was canceled in the late 1980s because of these influential factors.