Vsa Warning Light On problems of the 2014 GMC Sierra 1500

Yesterday I was driving home on the highway driving approximately 75mph when without any warning a stability steering control light flashed on the dashboard behind my steering wheel. The car immediately jolted from driving mid 70's down to an immediate 67mph. This speed limit was the last thing that flashed before my dashboard blacked out, the steering column locked and the vehicle entirely lost power while driving. Seconds later my windshield wipers sporadically started moving (I did not engage the switch) and I watched the temperature go up from 70 to 80 without touching the gauge manually. The car jolted for almost 10 miles sporadically losing control intermittently and when I exited off the highway and made a left hand turn at a low speed (under 15mph) the steering completely locked and the car pulled off to the side of the road toward a curb. I gained control of the vehicle manually which was difficult but I did correct the drive path back onto the road. I pulled into the dealership at a low rate of speed and the car did the same thing as it did when I exited the highway. I'm in a loaner and the dealer has my vehicle. This vehicle was purchased used roughly 2 months ago from a registered GMC dealer with 40k miles on it. It now has roughly 44k on it. I have made 1 payment on this vehicle thus far.