drdrh

Remember to leave 1/8" gap in front of the tailgate when mounting the retrax sides.

James, I removed to top bed covers to mark where the round holes are located, drill a 7/16" hole over these locations. The bed is made to place "fender clips" through the square holes into the round holes next to them. Using a 3/8" (or larger) to match the fender clips by 2" long. Next assemble the retrax as described in the instructions, but prior to placing on the truck; measure from the tailgate to each of the holes on and drill a 7/16" hole, then using a dremel tool I turned the hole into a notch the same diameter 1/4" longer in front and behind this hole. I then mounted the cover as in the directions, using the white plastic "set screws" to position the bed. Then using a 2" "fender screw" a metal tube spacer I picked up from NAPA and a washer to mount. The spacer will need to be cut to length, be sure to account for the washer to fill the gap between the bed and the retrax rails.

I placed a Retrax pro off of my 2019 Silverado onto my new 2021 Carbon Pro Denali 1500 Duramax. It took a little time to come up with a way to secure it, but for about $25 and time it looks like it did on my traditional bed. I would insert pictures, but have no idea how.