??? about newer trucks safety features & truck campers

Side question, anyone knows is those camera cables have some restrictions on length?
It is a pain to crawl under camper to disconnect the plugs there, so I am thinking about making in-bed receptacle for camper lights and if I could add 6ft of camera extension, I would make it on the side.

Looks like since 2014 and 2017 GMC decided to move the plug harness. It's now up in the back drivers side corner of the box. AND..... with theses new 18" monster tires they now have on them ( not sure how big your tires are) the side spare tire is right up against the plug harness.
When I first went to remove the tailgate / Camera I researched on line how it is done because GMC doesn't tell you in the owners manual. There were all sorts of comments on just removing the license plate to get at the plug...... welll not of the 2017...... it's a freaking pain farting around all the time doing this. If I could find a short extension with a male / female GMC connectors.... THEN.... I could put the plug behind the license plate..... you lucky dog you..... ( grin)
Soup

Sidehill soup, I have the same camera on my 2014 Chev, and I just take the licence plate off and the connectors are right there on the left side of the licence plate hole. Simply unclip and pass the cable through the hole that it goes through and then do the reverse with the cable extension.
Brian
Just looked closer at the Camera Source link and GM changed the plug between 2014 and 2017. I have 2 plugs that go into the 4 wire camera cable.

I don't have the lane changing warning with my new truck, however I do have a back up camera mounted in my tailgate handle.
I bought an aftermarket camera that is a plug and play, where the plug fits the GMC wiring harness under the box.
Aftermarket Camera
When I load my camper there is a bit of farting around to do with removing that monster 18" tire to remove the stock GMC tailgate/ camera /wire / plug. And then plug in the after market camera, then load the tire back under the box. Then load the camper and feed the aftermarket camera up onto the ladder on the back of the camper.
Works great.
Soup.

Our truck has a system called park sense. It lets you know how close to walls or unseen objects. We have to turn off the rear for obvious reasons but the from works great. The back-up camera is attached to the tailgate so it doesn't work with the TC but you can buy cameras to mount to the camper that can tie into your factory touch screen tv to work when in reverse. Actually looking into that now.

Lane departure is using cameras mounted on center mirror, so camper is not affecting it.
The blind spots use radars in taillights, so big camper covers them, making unusable.
I removed my tailgate camera, made extension cord for it and mounted on the back of the camper. Works like a charm with 360 coverage.
Even when I drop the camper and drive without tailgate camera, the side cameras are still very helpful.
Just couple days ago I had to find parking in the center of Atlanta. Went into small lot with automatic gates and sharp turns design for cars, not extended dualies. Thanks to front camera I did avoid several stop to see how much space I have in front.