Vehicle is a 1991 Chevrolet K1500 pickup. I know that there is a way to aim headlights yourself. So many places do not do it anymore and the body shop wants about $40 last time I checked. Pretty sure that mine are way out of whack! The process that I read about was to get a certain distance from a garge door,tape two pieces of paper with an X on them to the garage door, and use those to adjust the lights. Where do I find the specs for my vehicle's lights (how high/wide to aim them)? How far back do I need to be from the garage door, how big do I need to draw the X's, and how high and far apart do I need to place the X's?