Why would you want to? The only advantage of an LT tire is more load rating so you can haul heavy loads, like in a truck. Kinda a waste of money on a crossover CUV. More expensive, harder compound, more noise, rougher ride. But, sure you can do that if you want.
Edit: You do not have to go to an LT tire to get a more agressive tread. Plenty of agressive tread "P" rated tires.