The 2020 Cadillac CT6 will soldier into its final year with a simplified lineup. The luxury division has chopped trim to just three with fewer options and engine choices. CarsDirect reported Monday the 2020 CT6 will be available in Luxury, Premium Luxury, and Platinum trims. Those intrigued by a 2.0-liter turbo-4 or even a twin-turbo V-6 won't...