1959 Chevrolet El Camino

The El Camino was introduced for the 1959 model year two years after the Ford Ranchero. According to Chevrolet stylist Chuck Jordan, GM Harley Earl had suggested a coupé pickup in 1952. Like the Ranchero, it was based on an existing and modified platform, the new-for-1959 Brookwood two-door station wagon, itself based on the redesigned full-sized Chevrolet of that year.

https://en.wikipedia.org/wiki/Chevrolet_El_Camino#First_generation_(1959%E2%80%931960)