My issue is that GM offers the Cadillac XT4 with a 3500 lb towing capacity option for $655 Canadian. The XT4 has basically the same chassis, engine and tranny as the 2021 Envision but the Buick is only equipped to carry 1500 lbs and the option costs $815??? Why. The same is true of the 2018 2 liter Equinox/Terrain (with 9 speed tranny) which were rated to carry 3500 lbs and yet the 2 liter Envision was only rated for 1500?? Why has GM castrated the Buick line?? I know my trailer will be right around the 1500 lb mark for towing. I've already done a 40 minute test run with no issues and there is no problem with power or braking but what about a long haul at the max rating. The Equinox did it with no issues both down and back to Florida. I don't expect any problems but was wondering if anyone else has tried?