I have a 2017 Denali XL and easily tow and stop my 28' Cargo Mate race trailer (4,500 lbs) which holds a 3,000 lb race car, 800 lb golf cart, tools, and crew of three - 11,000 lbs. total. Previous to that I had a 2007 Denali which towed it with some effort, especially on off-ramp braking. Both...