Leaks up front in your 2004 Minnie Winnie (not Mini Winie) can be hard to pin down. Water comes in from one place and usually runs to some other place where it shows up. But it is pretty important to locate the true source of the Nile, so to speak.
On a Class C like your Minnie Winnie the clearance lights on the front are a prime source of leaks. Followed by the trim between the roof and the sides of the RV and lastly by any roof mounted items directly overhead.
You want to use a Silicone based caulks like NuFlex 311 or Hengs 311 - because all the sealants on your motorhome are silicone you can't use anything BUT silicone sealants for a lasting repair. Dicor is an RVers favorite, but it doesn't stick. It goes on nice. It levels out nice. And it looks nice. But you'd be able to pull it off easily from any silicone residue left behind by the OEM sealant.
About removing the cabinets or not, I don't know the answer to that. But usually they are just screwed into 1by framing that's easy enough to deal with. Hopefully someone with a Minnie Winnie that has been through this will answer.
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2017 Winnebago Adventurer 37F
2016 Lincoln MKX Toad
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