1959 Cadillac Four Door "flat Top" Hardtop Sedan on 2040-cars

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GM's Reuss explains why Cadillac is heading to New York

"We're going to take it to a place [New York] to change the way that we do business around the brand of Cadillac." - Mark Reuss
General Motors product chief Mark Reuss elaborated Tuesday on Cadillac's move to New York in 2015, saying it will "elevate" the brand and allow it to reach new customers.

Cadillac moving to NY as separate business unit

Cadillac is under new leadership, and the automaker is committed to turning itself (back) into a global luxury powerhouse. It's got a strong product offensive (of products currently in showrooms, and much more on the way), and now it will have a new location to call home.
Following earlier speculation, GM has confirmed that it is moving Cadillac's base of operations from Detroit to New York. Lest you think it might rent offices in the Chrysler Building (which is, after all, one of the tallest in the city), the new Cadillac global headquarters will be located in the Soho area with a "multipurpose brand and event space in conjunction with modern loft offices." The company is still evaluating which staff will move along with it to Manhattan, and which will remain in Michigan where technical operations will still be based.
The move from Detroit to New York is the first major change being instituted by new Cadillac chief Johan de Nysschen, who previously undertook a similar shift in moving Infiniti away from Nissan headquarters to its own facility in Hong Kong. Ford had attempted a similar move in relocating its luxury portfolio under the Premier Automotive Group (which then included Lincoln, Mercury, Land Rover, Jaguar, Aston Martin and Volvo) from Dearborn to Irvine, CA, but ended up moving Lincoln (the last one still under the Ford umbrella) back to Michigan. Other luxury automakers like Audi (Volkswagen) and Maserati (Fiat) are headquartered away from their parent companies as well, but have a longer history of independent operation.

Cadillac CT6 ushers in new naming convention

Johan de Nysschen has been at his new post as president of Cadillac for not even three months , but he's already seen two of his most notable accomplishments from his two-year tenure as president of Infiniti matched by Cadillac. The brand has announced that it is relocating its headquarters, and is now officially changing its nomenclature.
The brand's new flagship model will abandon the familiar three-letter designation enjoyed by every other model in the range (aside from the Escalade), and adopt an alpha-numeric title. So, rather than the expected title of LTS, Cadillac's top-end car will be called the CT6.
Of course, this won't be limited to just one model. According to Cadillac's press release, "familiar lettering like 'CT' would be used for car models, with the number indicating the relative size and position of the cars in the hierarchy of Cadillac models." And yes, that means what you think it means - Cadillac will use the exact same naming formula, albeit with different letters, as Infiniti.