Body Seam Fix with Trim Gard product
Here is a good-looking solution to this issue. I really didn't like the body seam looked directly under the running board area. I searched and found a product that really fixed this issue. I added black trim from "Trim-Gard" and was surprised how good it looked, or didn't look for that matter. After it was done, I don't even notice that area at all, and that, to me, is a good solution.
After you trim and install the "True-Gard trim", a section of the body seam that curves and goes verticle for ~ 8 inches is still noticeable (between the cab and bed). I simply lightly sanded and painted this part of the body seam with Eastwood chassis black. Looks great, if you can find it! I can email you a few images if you would like.