GM has said it is investing $81 million to prepare the Warren Technical Center, not normally a site for production car assembly, to make the Celestiq.

The Celestiq features technology already available on other Cadillac models, like Super Cruise, GM's hands-free highway driving system. It also has a 55-inch diagonal display screen and a glass roof that can darken to different shades in each of four different zones.

What will really set it apart will be the nearly infinite level of customization available.

"Each vehicle will be a custom-commissioned celebration of a client's individuality, leveraging innovative design, authentic materials and the latest in automotive technology," said Rory Harvey, GM's vice-president for Cadillac.