2016 Chevy Suburban w Towing Package

Update: we took the trailer out for a "test drive" on Friday of last week. It was a 29' Jay Flight BH with aa weight distributing hitch. On the Yukon XL, I had t/h mode enabled, the gain for the braking configured, etc. The sway at 50mph resulting from passing tractor trailers on route 50 in Maryland was so much so that it felt like I was going to lose control of the vehicle. Since I was purchasing from a private party, I took the trailer/tow vehicle to my Chevrolet dealer, and looked the configuration with a mechanic. We loosened/tightened the weight distributing bars, and couldn't resolve the sway. I ended up returning the trailer, knowing that I had a limited window and was so uncomfortable with the configuration that I wouldn't put my family in the car.

So, I'm left pondering what's next. Perhaps the experience isn't for me. Perhaps I need a better weight distribution/sway control hitch.

Thoughts?

Use tow haul when hauling or towing. I don't understand why this question comes up so often. It seems pretty simple to me. So many people seem like they're afraid to dare touch the T/H button.
I use mine even when not towing or hauling just to slow down. When I need to slow the empty truck the automatic downshifting of the transmission really reduces the need for brakes. I went almost 190,000 miles on my factory original brake pads.
Using T/H when towing will allow you to accelerate quicker, keep the transmission cooler, and slow down easier.

The t/h mode helps the transmission stop gear hunting which with my lighter trailer is only necessary on hills. Others disagree on this issue and have it on at all times when towing. The gain needs to be set to make the vehicle brakes and trailer brakes to work together. IMO you need to read the Chevy owner's manual before you test or drive again...and you should have before picking up your trailer. Then read some on sway.

Jayco Jay Flight 29 BH. It's 5050 dry and 7500 GVWR.

I did not have the vehicle in tow mode on the way home, not had I set the gain for the brakes on the trailer. I was feeling some sway which made me a little uncomfortable. Assuming there's some upside to engaging those features which I'm going to test now.

Welcome! What is the weight, length and tongue weight of your new TT? I use t/h on any hill up or down and not on flats but others do.