Look under the sill plate of the door for your vin # - or on the curb side of the front frame.
As far as a manual - you would be better off listing your appliance & model #'s and then downloading each manual from their website.....the Sunline manual is not model specific and IF you could find one it would be a miracle.
In the File section above you will find some information that may be helpful.....
Do you know what model you have? Year??? If so go to the files section - then to brochures - year - and download - then you can get details on tank size, etc.....
Welcome to the SOC family - hope you enjoy your new to you Sunline and by the way we love to see pictures......
Kathy & Leo SUN 093
Central Adirondacks of New York
2013 Rubicon 2900 Toy Hauler
We loved our 2007 T-2499
2010 Ford F-350 4x4 Lariat Super Crew Dually Diesel