Chevy Trailer Sway Control

I use the equalizer four point hitch and it is by far the best I've owned.

My 2012 Silverado 2500 has all of that, it comes with the Z85 package I believe. Supposedly its electronic and if it senses sway it applies braking to both truck and trailer. I believe there is a video on "YouTube". I'll try to find it.
I have a Reese Friction sway devise, I still use it on long trips, have not noticed the GM sway control activate yet.
One feature I really like that is part of the towing system is the "Hill Hold" feature.
I have noticed this a few times, if we are at a light on a hill the brakes stay on until you give it throttle. There is an icon that flashes on the dash when this happens, I believe its the Traction Control system light indicating it is activated.

The Reese sway control will stop the sway before it starts. The Chevy sway control will try to stop the sway once it starts. Keep the Reese.