High Quality Content by WIKIPEDIA articles! The Buick Blackhawk is a retro concept 2+2 convertible built by Buick in 2001. Its grille is based on 1939 Buicks and the concept car Buick Y-Job, while its main body is based on the 1948 Buick Roadmaster. It features a retractable hardtop, shaved door handles, and hidden headlights.