Insignia-based Cadillac DTS replacement to be called XTS?

Cadillac, which has recently shown an affinity for the letter X, will reportedly replace the aging DTS full-size flagship with a Canada-built model based on the upcoming Epsilon II architecture called XTS. If a recent report is to believed, the XTS will be built alongside the Chevrolet Impala and Camaro at GM's Oshawa, Ontario, assembly plant.

We've known for a while that both the DTS and slow-selling STS will be dropped in favor of one front-wheel-drive model based on the new Epsilon II architecture that debuted in the Opel Insignia and will also underpin the upcoming Saab 9-5.

Even though the XTS will be built alongside the rear-wheel-drive Zeta platform Camaro, GM has said that it will not use the Zeta platform for more sedans.

Canada's Financial Post reports that the car will be called XTS and will be built alongside the Impala, Camaro and an upcoming Buick Regal based heavily on the Insignia. It's expected that the XTS would share more than just its architecture with the Insignia, too, a sticking point for GM's plan to sell Opel to Magna International, which wants to share the automaker's technology with its Russian backers.

GM has said that it plans to build five cars between its Oshawa and Ingersoll, Ontario, assembly plants, including a hybrid. Thanks to funding from the governments of Ontario and Canada, GM has said it is committed to building 16 percent of its North American production in the country.

Since the Ingersoll plant - the CAMI joint-venture with Suzuki - builds the Chevrolet Equinox and will build the GMC Terrain, it seems logical that Oshawa would be tapped to build the Cadillac and Buick. Currently, the DTS is built at Cadillac's Hamtramck, Michigan, assembly plant alongside the Buick Lucerne - both of which ride on GM's older platforms and both of which are due for replacement soon. This does make us question the future of the Hamtramck plant.