The 2006 skid plate fit on my 2005 Limited without any problems. I don't think the front end of the truck was changed from 2003-2005 so you shouldn't have a problem. I posted some pictures of it in the gallery.
the 06s at the dealer have nice skid plates, but I alread have a T&H bull bar installed on my 04, so if I chose to install a skid plate, I will have to do it the way momo did.