Cadillac has been on a path of resurgence over the past few years. While its ATS, CTS, CT6 and the Escalade are all competent players in their respective segments, there has been a gaping hole in its crossover line-up. In this all-important category, the sole contender Cadillac had all this while is the XT5, which replaced the SRX a few years back. While the smaller XT4 will go on sale this year, GM’s premium brand is working on a larger three-row crossover. This week, our spy snapper has managed to get photos of a prototype testing on public roads near General Motors’ Proving Grounds in Milford, Michigan.

The new SUV, expected to be called the XT6, wears black-and-white camouflage that is similar to those seen on the CT5 saloon prototype recently. From the photos, the XT6’s proportions look consistent with its positioning as a potential rival to the likes of Audi Q7, Volvo XC90, Infiniti QX60 and the recently launched Lincoln Aviator.

The XT6 is expected to be underpinned by the same GM platform that forms the basis for many crossover SUVs including the new Chevrolet Traverse and is likely to employ naturally aspirated and turbocharged V6 engines with an eight-speed automatic transmission driving all four wheels.

The XT6 could be revealed in production form later this year or early next year and will go on sale in 2019 as a 2020 model.