2015 GMC Yukon XL electrical system problems

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.

My right rear tail light works on and off for about a year . I have 41,000 miles on my car and now the left tail light goes in and out also so I potentially could have two brake lights out at the same time. I've seen several of the same car is on the road with the same problem GMC denies the problem and charges $800 per tail light to fix it's a huge safety concern and I don't feel like my family is safe and I don't think we should be liable for their faulty light equipment.