Enthusiast III
Necessity is the mother of all invention. When it comes to adding things to your vehicle form should always follow function. So what do you need? That is up to you. Navigation, GPS is great but one could do it with paper maps. Communication, you could go with nothing or you could run a multi-tiered system depending on your needs. A trailer brake, you might need one or not and it could be a factory in dash unit or an aftermarket one. Switches are required to run all your cool lights, winches, and lockers but then again some people just run a stock rig. My point is your don't need to add anything to your dash except for when you do.