A bedside is the outer panel that makes up the left or right side of a pickup truck bed. It is usually a large, single stamped piece of steel or aluminum running from the back of the cab to the tailgate. In collision repair, bedsides are frequently replaced entirely rather than hammered out due to their massive size and structural role in the box assembly.
Heard on the job
We need to drill out all the factory spot welds to hang a new bedside on that F-150.
Insider tip
When quoting a bedside replacement, always factor in the labor time to remove and reinstall the taillights, bumper, and bed liner.