How To Replace seat heaters, cushions and upholstery

Been there... My driver seat heater tried to burn the truck down a few years back.

 

I think you could do the whole thing without removing the seat if you were determined. I have a bad back and it is just easier to pull it out and put it somewhere I am comfortable to do the work. Its also easier to photograph things outside the truck. The only real down side to removing it is the weight, they are heavy. Otherwise I think taking 10 minutes to remove the seat saves at least that much time not navigating through the truck, around doors etc.