Call Tiffin directly with the vin# of your rig or there might be a serial number on a label inside one of your interior cabinets. They should be able to tell you from that info what chassis you are on. Hope this helps.
Steve & Sally / Hudson Our Little Pom / Heidi, Houston & HiTee Forever in our Hearts
04 NEWMAR MACA 3778 W22 / 05 PT Vert
Michigan (Summer) Michigan (Winter For Now)