Received my 8 meter cable for the dashcam rear camera today (the 6 meter it came with wasn't long enough), so I wired up and mounted the rear camera.
The 6m might've worked if I ran it on top through the headliner, but I didn't want to mess with the airbags.
I ordered an 8m one and ran it across passenger side tucked into headliner and down the A pillar (only airbag I had to deal with) and down to the kick panel. Then back under the door sill trim pieces to the rear 3rd seat and cargo area where I tucked it under the trim plastics. Once to the rear I pulled the pieces off across the top of both the interior and liftgate, and in the corner where the speaker is. I ran the cable up the rear corner then across the back of the headliner and through the rubber boot that houses the wires going to the liftgate. I filed a notch in the backside of the liftgate top trim piece for the cable to come through and attach to the camera which is mounted on that trim piece right behind the glass.
This leaves no big cable loops and allows the camera to raise with the liftgate, but stays put when the glass is raised.
2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18