My 2020 Laramie 1500 has ramboxes and the MFG, and also came with the factory tonneau cover (and so, I have the black rails). After some researching, I came to the conclusion that I need to either swap to the silver rails (dealer didn’t offer to swap for free, had to buy the outright) or get one of two covers that work with the black rails. The two I found were the American Truck Covers’ retractable cover or the Diamondback cover. Ended up getting the Diamondback cover and really like it. I was leaning more towards the retractable cover and it looks like it would be pretty sweet, but i got worried about dirt and other gunk fouling up the mechanism over time. The Diamondback is less versatile in some ways but also more versatile in other ways.
Some photos below. As you can see, I added a hidden bike mount under the cover that can be used to carry one bike when I want. When not using it, it’s completely hidden and out of the way.
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