13-14 GM Silverado and Sierra Camera install video
Here is a video to help with the install on a camera for the 13-14 vehicles that are not pre-wired. This is made by the manufacturer Camera Source.
The above video does have some differences as they will not have to pin and instead will use the provided EZDZ wire. Here is a diagram that shows everything except that EZDC. The EZDC goes from the camera loom to the behind the cigarette lighter.