Concepts GM Firebird : fusées roulantes
Photo: General Motors
GM Firebird II

GM Firebird I

GM Firebird I

GM Firebird I

GM Firebird I

GM Firebird II

GM Firebird II

GM Firebird II

GM Firebird II

GM Firebird III

GM Firebird III

GM Firebird III

GM Firebird III

GM Firebird IV

GM Firebird IV

GM Firebird IV

GM Firebird IV

Le concept GM XP-500 a été dérivé de la Firebird II.