GM to introduce new, high-end Cadillac next year

General Motors will begin building a new, top-end Cadillac sedan late next year at its Detroit-Hamtramck assembly plant.

The auto maker said Friday that the rear-wheel drive car will make its debut in the first half of 2015, and that it will reveal the name of the new model soon.

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The new Cadillac is part of a $384 million investment GM announced last spring in the assembly plant, which straddles the border of Detroit and the enclave of Hamtramck. That plant also makes the Opel Ampera, the Chevrolet Impala and the Cadillac ELR, a luxury version of the Volt.