Billy, ours is a 2013 and our paint is also cracking just below the water trough on both sides. The odd part is it just happens to be above where the two rear slides are. I have spoke with others and everyone seems to agree that it is the caulking that didn't cure properly. It is actually at camping world right now having this issue along with a few others fixed.
From your pic it appears that there was just way too much caulking applied. Although it may just be the angle. Do u have anymore pics? This one is the right side, but the left is doing the same thing. Jerry
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