14-18 Rear Bumper Sensor Wiring Harness Conversion to 07-13 License Plate Lights 

This conversion may be applicable to your case, but not in my case. I had completed the 14-18 bumper conversion onto my 2010 GMC Sierra 1500 SLE. The 14-18 harness was a direct plug and play. No cutting and no splicing required. My entire bumper and harness conversion was done in just three hours. My only difference to yours was that I had the four rear park assist sensors that needed to be transferred over to the new bumper. The mounting holes did require the holes to be enlarged, which a step drill bit was used with success. I had also purchased the newer trailer combo plug, which was also a simple plug and play.

Nice work 🦆

So can I just depend the old connector from the old bumper? Where does it connect with the new connector?

Is what about wood back up sunset