The Pontiac LeMans /ləˈmɑ:nz/ is a model name that was applied to subcompact- and intermediate-sized automobiles marketed by Pontiac from 1961 to 1981 (1983 in Canada) model years. ... In 1964 the Tempest was available with an optional GTO package that later becale a separate model, the Pontiac GTO, muscle car.