2012 GMC Terrain wipers, windshield & visibility problems

Tl* the contact owns a 2012 GMC terrain. While driving approximately 65 MPH the contact opened the rear driver and passenger side windows and noticed the sunroof began to vibrate violently. The vehicle was taken to the dealer for diagnostic testing. The technician stated nothing could be done because the vehicle was designed that way; therefore, there are unable to repair the vibration. When the contact opened the front and rear driver and passenger windows the vibration did not occur.

While driving down the highway at about 65 MPH in a bad thunderstorm, the wipers stopped working, stopping about halfway up. After pulling over to the side of the road, we discovered we could hear the motor clicking but the wipers wouldn't move. We had to dangerously drive several miles with very little visibility until we could find a safe place to pull over to try to access the situation further. We were 4 hours from home going on a weekend trip, about an hour from our destination.