I’m going to throw this out to the resources of the Dopers…
In 2006, after Carnivàle went off the air, there was a huge auction of its props and assets. One of the items sold was the 1930 Chevy LQ truck featured in nearly every scene - the flatbed that Ben drove everywhere, with a multi-tone blue cab and the sun/moon logo on the doors. I saw that someone had bought it for about $23k.
I want to find the current owner and status of this truck, but Creakyvàle is so damned antique that there are no communities, sites or online fans left, it seems. My Google-fu account is exhausted looking for clues.
I know the owner of another Carnivale truck, a 1929 flatbed chevy. All original, aside from the sun/moon logo painted on the doors. Looks the same as the 1930, except for some differences in the truck’s bed(darker wood, doesn’t have the metal pieces between the boards). The prop house found it in some lady’s barn in Arizona.