Kaisen
Explorer
I can and have put a full sheet of plywood in my Suburban without removing seats?? Fold down the second row, which fold flat, and the third that, while not flat, is sufficiently low. And removing the third row takes two steps.. Fold it, release the tab, and pull it out.
I've owned Suburbans for years (still have one) and had an Acadia for a year (company car)
"Sufficiently low" in the Burb means 16" folded....basically a 16" bump in the middle of your plywood, drywall, mattress, etc. Possible? Yes. Realistic? No.
In the Acadia, there is no bump. Center and third row fold flat, and that flat area is 4' wide x 8' long.