Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
I have seen the electronic shocks on both Denali’s and Escalades freeze, as in the shock piston will not move. I would take it to a shop and have it checked.
That's primarily happening with the mag ride. His '11 ain't got that.
OP, we talked about video and not doing it on purpose. Maybe a friend goes real slow down those bumps while you watch /film from outside up close just so you can witness what is actually happening down there. You could stop him before more damage occurs.