There was something about my GMC truck that drove me nuts. It had round protrusions along the side of the bed, where some Airfield matting was attached. That didn't happen in real life, and those protrusions didn't exist on a real truck. So, I pulled out the Dremel tool and ground them down, and painted them over. Then, I added what I think is a pretty good-looking load.
Look at the bed side, this is what it used to look like.
This is how it came out of the box:
