For me it started as a kid watching a cheesy 80's Mexican movie called "La Camioneta Gris". Literal translation is "The Grey Truck". The movie was based on a song by the same name, the group members were also the actors in the movie.
I told myself when I got older I wanted a truck just like that one because the only thing that could stop it was a train (literally, according to the movie). Thats why also love me some step sides.
Here a link to the music video.
https://www.youtube.com/watch?v=uMAjSb5v5As