Fitment matters on a midsize pickup because equipment must match the exact truck, attach to appropriate points, clear moving parts, and leave enough capacity for the people and work it carries. A bed cover, rack, hitch component, or wheel can look suitable yet conflict with a different bed, trim, factory accessory, or operating requirement.
Treat compatibility as more than whether an item can be fastened in place. Check the model year, body and bed configuration, mounting instructions, component ratings, added weight, and any affected systems. The goal is an installation that works through normal loading and movement without hiding a new limitation elsewhere on the truck.