Welcome to the club and congrats on your new Sunline!
It sounds like you have an older Sunline. They had a VIN tag or stamped in the trailer A frame. A frame meaning the hitch part.
Iím not sure which side or location. Iím not the guru on the older campers.
There was also a practice to put a VIN tag under the threshold sill plate of the main entry door. Again not knowing what year you have, Iím not sure when the practice started. If you cannot find one on the A frame, check under the door sill plate. You do not have to take the door out, just the plate in the inside attached to the door frame.
If you have a title, the VIN would be on the prior owners title
We look forward to hearing and seeing about your Sunline adventures. We like pics!!!
Hope this helps
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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