Do you have the rear window defroster? If you do, you have the wiring for the heat since the button for the rear window defroster turns them on. I guess it would come down to how much they were going to charge me for them. You might want to check on e-bay for them....you could save quite a bit of money. You might have to have the dealer reprogram your BCM to control them. As far as I knew, to have the power extending ones you also had heated. I'm not 100% sure on this one, but that's what I have seen on other people's trucks and when they put them on sale. Almost all of them have been heated.
Check these out: http://www.dieselplace.com/forum/showthread.php?t=124433
You will have to PM the guy if you have any questions or want to buy them.
Check these out: http://www.dieselplace.com/forum/showthread.php?t=124433
You will have to PM the guy if you have any questions or want to buy them.