When I leveled the front end of my 2500, before I did any work I drove into my garage, turned my lights on and using electrical tape marked the floor where my front tires were, then the wall above and below the brightest portion of all the lights including the fog lights. Made the change to my keys and shocks. Leveled the truck, then turned my lights back on that are now higher on the wall, adjusted them down using the screw mentioned behind the light fixture until the beams are exactly where they were stock.