Adding heated seats?

I currently have leather seats and never bothered to look and see if they were heated when I bought the truck. I guess I just assumed the leather came with it. I looked under the seat and it looks like the "plumbing" is there to do it.

Would anyone happen to know how difficult it would be to add?

~digdug

You should be able to heat them around 400 aftermarket. And this is just a guess but I would think over a 1000 if it is possible from the dealer