I just found out something. 2008 Silverado and 2014 Silverado. The parking centers only have right wires for each connector. All you have to do is to switch out the plugs that go to the connector on the parking center because you're both 3 wires.
The when you did the video about wiring up the bumper. That 2014 bumper, you said you had to slice a bunch of wires to add parking sensors. I found out something. The 2014 sensors on the back of sensors only have 3 wires. The 2008 has the same thing, so all you have to do is change. The sensor to 2014 and the 2014 connector.