Cadillac's crossover lineup is expanding, in more ways than one. The upcoming XT6, expected to make its debut at the Detroit Auto Show, is the most recent. Slotted between the smaller XT5 and larger Escalade, the XT6 will use a 3.6-liter V6 producing 310 horsepower (231 kilowatts), routed through a nine-speed automatic. All-wheel drive should come standard and even a hot 400-hp (298-kW) model could happen.