First thing would be to determine which 18 ft. version you have. In 2008 I think there was one made with a slide and one without. The specs are different. Then go to each of your appliances - stove, refrigerator, microwave, etc. and find the manufacturer and model numbers. Then go the manufacturers website and you should be able to find a manual specific to that model. Or someone here may have the manual for same model appliance you have and could send you a copy.
2011 Chevy Silverado Crew Cab 4X4
2009 210 WBS