Any 20 year old vehicle is a gamble for a cross-country trip. Chassis parts for old Chevy vans are common enough, but the Components used in the RV chassis versions are sometimes different enoughto become a problem. Most often the problem is simply that auto parts stores don't have separate listings for the RV-variant of a Chevy van. If the part number can be identified, it will usually be available. Common differences will be belt and hose sizes, a/c system, brake parts, etc. Sometimes the "ambulance" version parts are the right ones.
2004 American Tradition; 2013 Buick Verano
Homebase in the Ocala Nat'l Forest near Ocala, FL