My '77 Excella 500 came with Zip Dees on the curbside, streetside and one at the rear over the window. They really help provide shade to the side of the trailer to cut heat down on the inside of the trailer. The large curbside awning provides enough shade for gatherings especially when boondocking when interior temps are rather uncomfortable in the interior. The awnings also help during periods of heavy rainfall so that I do not have to close the windows and lose ventilation. Lastly, my refrigerator is on the curbside so the awning provides shade making it more efficient.
'01 2500hd ext. cab, 8.1 litre gas, 5 sp. Allison auto
3.73 rear end
Mag-Hytec rear diff cover
Amsoil Dual by-pass oil filtration system
Amsoil synthetics all around
265 watt AM Solar, Inc. system