Is my RV a Chevy Express 3500 or 4500?

jdelduco wrote:
Hello All: I have a 2017 Thor Chateau 22B. I have been unable to determine definitively if it is an Express 3500 or 4500. I have called Chevy Customer service with the VIN and they couldn't say. I've called Thor and they couldn't figure it out. I've registered on Chevy's website and entered the VIN and it say's just that it is a Express Cutaway but Doesn't say 3500 or 4500. I've called the dealer and they said it was a 3500 but they I think they were just trying to get me off the phone. The best proof I have so far is the GVW for my RV listed on Thor data sheet matches the GVW on Chevy's website for the 3500. But I still find everyone referring to the 22B on-line as a 4500. If I go by the GVW it looks like they don't go to the 4500 until you get up to the 27 footer. So my question is does anyone know definitively what it is a 3500 or 4500, how do you tell and what is the difference. Thanks John