I had the bulge in the siding above the front drivers side window on my 21QB. Wait time to get anything fixed at my dealer is an average of 6 weeks, and I was told that before I bought the trailer, as I did ask them. Got it in and they fixed it and had the trailer back in 2 days. Work came out perfect. The shop told me that the problem was that stapling was off, so that 3 foot area that was bulging was never anchored to the frame. This was about a year ago when I bought the trailer, so far, no other areas have had the bulging issues. Good luck with yours, but it's really a bummer that you have to wait so long to get your trailer fixed.
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2018 Jay Flight 21QB
2017 RAM 1500 Laramie 5.7
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