2008 GMC Acadia electrical system problems

I own a 2008 GMC acadia I have had it used since jan 2015 I have had it in dealership almost every 3 months since I bought it. I was recently driving and had a fire in the passenger heated seat where my daughter was sitting and it burned a small hole in her jeans so far GMC is checking to see if its a defective equipment failure or not? In the mean time my sunroof has quit working and now my roof is leaking and my car smells like mold. The whole electrical system is going crazy with flashes of interior lights.

This vehicle will all of a sudden start swaying from side to side and the stabilitrak light will come on. In addition, the transmission will suddenly seize up, losing acceleration and nearly causing a crash. The engine will also state that it is overheating, all of a sudden and the vehicle will shut itself off and smoke will start coming from the engine. This has happened while going between 35 and 65 MPH. On the streets and highways.