Has anyone bought plugs for the access holes located below the doors on the underbody? When my truck was oil sprayed the guy showed me that there are four access holes on each side that are covered with tape from the factory. He pierced the tape to spray inside the channel at the bottom of the door sills. These holes are located close to where you mount the bolts for the factory running boards. I'm calling the dealer tomorrow, but don't know what to ask for.