this is what the vent is for behind your tire on the back door so it lets air thru to stop air hammer or pressure build up in the cab....i could be completely wrong on this but it makes sense lol
this is what the vent is for behind your tire on the back door so it lets air thru to stop air hammer or pressure build up in the cab....i could be completely wrong on this but it makes sense lol
Actually, all modern cars/trucks have vents like this to help evacuate air inside the cabin in the event your air bags deploy.