I've seen a couple post about one or the other, but has anyone added heated mirrors and a rear defrost window?

 

Yes to both, besides the obvious needing new heated mirrors and rear window. Youll need a new hvac dash module, so both will function. Not sure if the wiring for the window is there per your truck, but the mirrors is.

 

I have the wiring behind my seat. Did you add both to your truck?

 

No, my 12 xlt came with both from the factory. Guys that have added both, just need the proper dash hvac cluster to enable the features. It just replaces the one you have on the radil bezel. Simple plug n play...