Might be, not sure. I couldn't find any dimmensions for the cab to compare. If you have correct dimensions for the cab, i can compare and see how it is in terms of scaling
Viewing post in FS25 2006 GMC Savana/Chevy Express Service Van comments
https://imgur.com/a/ZlMjNNU Hope it helps. I could also just be crazy too, or comically that it's the only properly scaled vehicle and everyone elses mods are just off. Haha.
Well, can't fully measure it since it is the van version but measuring the height and width only i'm almost spot on. It is even a bit overscalled. I scale my mods as close as possible to the real life ones. Everybody else doesn't, they overscale by much, so it isn't uncommon people to think that my mods are too small.