"The XTS has several more model years to come," said David Caldwell, a Cadillac spokesman, in a phone conversation on Tuesday with Edmunds. "Its life cycle goes almost to the end of this decade. When you get there, you'll have a largely different portfolio. We'll be adding eight models between now and the end of the decade."
He added: "But there is no direct replacement for the XTS after 2019."
The 2015 Cadillac XTS is on sale now at Cadillac dealerships.
The all-new Cadillac CT6 stole much of the spotlight at the 2015 New York Auto Show.
It's a large sedan positioned above the current CTS in Cadillac's lineup. With a wheelbase of 122 inches and an overall length of 204 inches, the CT6 is bigger than the standard-length Audi A8 and BMW 7 Series, but slightly shorter than the extended-length Audi A8L and BMW 740iL models.
Edmunds says: Cadillac luxury buyers get some reassurance that the XTS will be available for several years to come.