Hi Steve,
Do not know what year your T2499 is however they only made that floor plan from 2003 to 2007 and I know those years fairly well.
You mentioned, "skylight", "Crankable" and and you want to use Dicor caulk on it.
From that, I thinking you want the roof vents. There are 3 of them in the 2499. One in the bath with a "whizzer" fan as we call it... 1 in the bedroom and 1 in the living room area.
Do you want just the plastic dome? Or the entire unit, which is the metal flange, plastic dome and the screen? I know some of the 2004 models had real issues with rusting and the domes going brittle real early in their life. I happened to get 3, 2004 models with this issue. A 2004 T2499, A 2004 T310SR and a 2004 T1950.
If you want a replacement dome only, this is what you are after to be the same as the Sunline one which has the older hinge system. This one
https://www.etrailer.com/Enclosed-Tr...BV0554-01.html
You can search that part at other places too, I know Etrailer and have bought many items with good success. If you buy over $99 worth you get free freight
Heads up, that original style has a different hinge and screen setup then the new ones you can buy today. While they do sell the replacement domes to fit those older vents, Ventline discontinued the metal flanges and that style hinge.
If you want the entire unit, dome, screen and metal flange, then this part number. This is the new style with the easy removable screen and the new lid hinge.
https://www.etrailer.com/Enclosed-Tr...2092SP-28.html
or here
https://www.rvupgradestore.com/Non-P...-p/31-1675.htm
or here
https://www.amazon.com/Ventline-V209...70_&dpSrc=srch
If you want the entire unit with a whizzer fan then here
https://www.etrailer.com/Enclosed-Tr...2094SP-28.html
I would shop for that one on price. It seems really high for just adding the whizzer fan.
Here it is on Amazon for a lot less
https://www.amazon.com/Ventline-Roof...70_&dpSrc=srch
Here is the Ventline website direct.
https://ventline.com/ventadomes?b=1
If you want to replace the ceiling garnish, the plastic trim inside, you have to get the correct length. The standard ganish that comes with many of the roof units is too short. They do sell the longer ones.
Hope this helps
John
Let us know if you are taking up the metal flange off the roof, can give you some pointers on how to get the sealant to release and not be a real bugger of a time.
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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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