A bed cap assembly for a cargo area of a vehicle, the cargo area includes a first bed wall and a second bed wall that is arranged at an angle relative to the first bed wall. The bed cap assembly includes a first bed cap configured for attachment to the first bed wall and a second bed cap configured for attachment to the second bed wall. The first bed cap includes a first channel, and the second bed cap includes a second channel. The first channel and the second channel are connected together. One or both of the first channel and the second channel may include a drain for evacuating fluid and/or debris from the first channel, the second channel, or both.