We are going to need a little more to go on to help you with your quest on model and year.
If the outside of the camper has not been painted over, posting pictures of all four outside walls helps tell a story about the year and model. Sunline changed the striping, colors, and decals from year to year. Once the year is known, then where the windows, doors, and roof-mounted vents are located are clues to the floor plan. Even if the camper is painted, pics of the four outside walls help hone in on the model.
As Brad stated, the VIN contains the "model year", but not the actual model. If you can find your VIN number, and count starting from the left (1LC) is the first 3 digits, count 10 places left from the end, and the 10th digit is the year. Tell us that digit, and we can help with the year. Assuming the camper is not before a 1980 model year when the 17-digit VINs started.
Once armed with the model year, use the FILES section on the forum to look for Brochures in that year and back into the floor plan.
This will get you started. We are here to help check or hunt with you. Just ask.
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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