It's believed General Motors will produce the new Buick Enclave and, potentially, a complimenting crossover from Cadillac at its Lansing Delta Township Assembly plant in Michigan after a $583 million plant retooling.

According to the Lansing State Journal, the two new crossovers will ride on GM's C1Y platform like the 2018 Chevrolet Traverse which debuted at the 2017 North American International Auto Show in Detroit. The C1Y platform helped the Traverse shave 362 pounds while offering a stiffer body structure, Buick is expected to show off an all-new Enclave at the 2017 New York Auto Show in April.

The C1XX architecture is a crossover variant of the new Epsilon mid-size platform, it replaces both the Lambda and Theta architectures in one stroke, C1Y is the long wheelbase version of the platform. The previous, Lambda based, Enclave and Traverse already come from Lansing Delta.

The unnamed Cadillac crossover should be with us by 2018, GM could build it at Lansing Delta with other C1Y crossovers, or even at Spring Hill Assembly in Tennessee, alongside the short wheelbase C1U crossovers, the Cadillac XT5 and GMC Acadia. Where the Cadillac gets built is entirely dependent on capacity, with both the Enclave and Traverse proving popular its likely production of the big Caddy heads south of the Mason Dixon.