I have the intellihaul system on my 2015. The side view cameras are integrated into the side view mirror outside cover. they are not easily removeable. the kit includes two side view mirror cameras and covers. The system has an extra port for use with a front camera, or a 3rd brake light camera. The trailer camera is wireless, however a word of caution. If you have the wireless camera 30ft or more from the back of the tailgate make sure the camera is mounted high on the trailer with the antenna above the trailer.
I have mine set up with a front camera and converted the trailer camera to a wired camera and also have a switch to switch between the tailgate camera or trailer camera on the nav display when intellilink is selected.
One other mention, Federak regs, require a factory backup camera to work for something like 15 seconds or more. So if you hit reverse with the trailer camera display, it will switch to the tailgate camera. After 15 seconds if you then hit the intellink system again, you can select the trailer camera.
2011 Keystone Outback 295RE
2004 14' bikehauler with full living quarters
2015.5 Denali 4x4 CC/SB Duramax/Allison
2004.5 Silverado 4x4 CC/SB Duramax/Allison passed on to our Son!