Drawing a fire truck is really hard but could be fun. It depends on your skills to draw a fire truck. If your a pro at drawing, then it might be easy, if your an amateur, I would start off with a cartoon or basic fire truck, and then edit that basic fire truck or cartoon fire truck to make it more detailed/realistic. So, why not begin with just a video. I don’t think I could actually make an article that tells you detail by detail on how to draw a fire truck, especially a vehicle that’s high detailed with designs and pieces. Below is a drawing video that will seem way advanced probably for you, but just try getting the shapes done that you learn from the video.