Here’s a Lego truck I designed a while ago, and instructions for how to build it. They’re a little more condensed than official Lego instruction manuals, but you all have brains. I’m confident you can figure it out.
And there you have it! Feel free to tweak the design however you wish, and have fun. Also, if you don’t have any of those old wheel and axle pieces, modern ones will work as well, and even lend it a bit of a “hot rod” look: