I have made several mods to my Titan. One that was really cool that completely escaped me was the bed mat. If you order a 99-2001 or 20002 Chevy Silverado standard bed mat it fits 99.9% perfect in the Titan. It even has the cut out for the rail near the tailgate. only the corners towards the front of the bed don't match up. It is so close though that you won't notice unless you really look. I am a pretty hardcore perfectionist (vacuum the truck twice a week) and it shocked me how well it lays in there. I bought it from Napa with a tailgate mat together for $80. Keeps stuff from sliding around in the bed. Sorry for holding out!