Detroit: Spencer Pigot, Ed Carpenter Racing Chevrolet, Sébastien Bourdais, Dale Coyne Racing with Vasser-Sullivan Honda, Max Chilton, Carlin Chevrolet
Spencer Pigot, Ed Carpenter Racing Chevrolet, Sébastien Bourdais, Dale Coyne Racing with Vasser-Sullivan Honda, Max Chilton, Carlin Chevrolet