I think they are standard on some trim levels, or part of some other option package.You'd think they'd just be standard equipment.. They make the rear wheel arch look finished and clean. I had to buy them for my 06'. I steam cleaned them and sprayed a can of 3M 08883 rubberized undercoating on the painted metal surfaces before installing them.
Had to order them on my 2015 when I bought it. If they came with a package or trim level, you'd think a Laramie would have them. $100+ to the dealer!
Snow Chief group on my truck.I think they're part of a trim package.... Snow Chief Group, Off Road package, something like that.
My 18 came with them, but I don't see anything on the window sticker that would include them.
Then again I bought it used and maybe the PO added them in the 3K miles and 2.5 months he owned it.. but he didn't add anything else aftermarket like mud flaps, etc.
You owe me a beer!