Quoted from UltraPeepi:This is about what it looked like to fit GOTG in my 2018 Acadia. I put a thin piece of hardboard so when I slide the pin, it doesn't rip up the carpet. This made it a very tight fit - like it wedged into the head liner at the opening. No damage to the headliner. It had just enough give.
I have a 2017 GMC Acadia, a few weeks ago I hauled back my Godzilla pro. Both the 3rd row and the pilot seats had to be folded down but there was wiggle room. Plenty of depth and width space. The height was close (less than 2 inches) getting in through the trunk/hatch, but once settled in the cab I had at least 3-6 inches between the head and the roof.