Most Holiday Ramblers from model year 2002 on should have the VIN plate at the driver's side window. For some of them with an aluminum siding, you might have to open the exterior driver's window. There also appears to a second or hidden VIN location under the hood of some Holiday Ramblers with their VIN number etched on to a silver metal piece located on driver's side on or above frame rail just in front of front left wheel.
* VIN locations may vary; consult owner's manual.
