1931 Cadillac V16 Phaeton on display at GM Heritage Center Dual-windshield, Fleetwood-bodied 1931 Cadillac V16 Phaeton on display at GM Heritage Center in Sterling Heights Michigan (with 2003 Cadillac Sixteen Concept car visible in the background of this photograph). © 2018 d2 Saline, All Rights Reserved. USA 1931 Cadillac V16 Phaeton on display at GM Heritage Center