I have a new GMC 1500 Denali with the new Carbon Fiber truck bed. I attempted to install my tonneau cover. The inside flange on the truck bed isn’t strong enough to stay straight enough to attach the tonneau cover to seal across the front of the bed. The truck is fantastic but I’m not sure about the carbon fiber truck bed. Side rail flange needs to be reinforced. I don’t want a leaky water filled truck bed after a rain or truck wash. Not impressed with Carbon strength.
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