I test drove a 2500 Bighorn a week ago. It had the digital rear view mirror. My opinion it is a huge game changer, and is a must for a truck. The one I drove it was using the tail gate camera. On the forums, there appeared to be a lot of confusion on which camera it displayed (tailgate or bed camera).
This truck had a hardwire camera port on the bumper for a hardwired camera to be added to the rear of the trailer. As I understand it, it would automatically swap over to the trailer camer when in tow mode. The dealership did not know how many cameras it could support. As the 5ver we are looking at has 3 cameras on it.
Good luck, keep us up to date, as I too probably be ordering new TV (1 ton) in the near future.
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