Just installed OEM nav unit in 2014 DCTRDOR. (Thanks FLTrucks!). It is awesome.
When installing I ended up with two very similar antenna input cables,one that came with the supplied GPS antenna and one in the bundle of wires. Bottom line I think the 14 came with gps antenna installed, maybe in the shark fin? Well I plugged in the one already in the truck and it worked flawlessly.
Complete plug and play, other than the entune VIN thing which was easily fixed (a 2015 VIN will work).
If anyone is interested in 2014 entune non-nav with all mounting including dash plate, PM me!