2015 GMC Yukon brakes problems

The contact owns a 2015 GMC Yukon. The contact stated that while driving at 40 MPH, the rear brakes became inoperable, causing the steering wheel to seize, with no warning lights illuminated. Due to the failure, the vehicle crashed into a tree. The contact and the contact’s child sustained injuries and were transported to a local emergency room for medical treatment. The contact suffered a broken nose and a chest fracture. The contact’s child sustained a broken leg due to deployment of the passenger-side air bag.

Brakes become hard to push when going below 5MPH and doesn't want to stop when pressed. Sometimes you press brakes and push as hard as you can and it just keeps moving until he slowly comes to a stop. It happens when traveling at a low speed or even at a stop and you need to barely move forward or backward. Makes it hard to park in tight spaces, move in traffic, and in a drive-thru.