Jim24

My previous 2014 Chevy was able to fit boards cut at even numbers if I remember correctly. So oddly enough I was also searching for a simple measurement that I thought was just not finding from GM or Chevy for their 2021 models. The bed is definitely set up for 2×6 boards, however you will have to do some of your own measuring. The upright board divider slots (at the bottom of bed) in front were not the same width as the rear slots in my truck. My boards are just under 71 and 1/4 inches up front, but 71 and a half at the rear. The slots for horizontal placement (atop the bed sides) also measured 71 and a half inches. I would assume some degree of irregular measure may be due to the spray in bed liners on each truck. But some cutting & trimming will undoubtedly be necessary for each individual truck.