Front Seat Heater/cooler problems of the 2015 GMC Yukon

My seat heater malfunctioned, burning a hole in my seat backrest, and burning a hole in my jacket! 30 seconds after leaving my home, driving on a residential street, I suddenly felt a sharp poking in my back. When I reached back I was shocked to feel the seat burning and a hole in the seat! I reacted immediately, turning off the seat heater and pulling over. My car had smoke and smelled of burning plastic. I look at the back of my drivers seat and there was a hole in the seat where it burned straight through. And when I took off my jacket I found a hole there as well where the seat burned through it as well. I had a small burn, but it was only minor. It was a disturbing situation that could have been worse if I didn't react immediately or was driving on the highway. Today I took it into my local GMC dealer who didn't seem very concerned and let me know it would be expensive to get if fixed. I declined the service at this time. I then called GMC customer service who documented my situation, but also didn't seem concerned. I would have hoped GMC would have wanted to at least diagnose root cause to ensure there is not a larger problem on their hands. I am not looking for a payday here. I want to make sure this doesn't happen to others at a time that it could cause a more serious accident or injury.