Emma Verrill didn’t know that the heated seat in the back of her friend’s Chevrolet Suburban had been turned on until she awoke the next day in 2012 to find a blister the size of her palm on her skin. Verrill, who is paralyzed from the waist down and can’t feel hot and cold in the lower half of her body, suffered a third-degree burn on her buttocks that was so serious it required surgery and months in bed to heal.Verrill, 26, is now suing General Motors, the legally troubled maker of the Suburban she had been riding in, seeking to hold the company liable for her injury.