I don't think I would want it mounted under the bed and in a confined area that would appear to not have much air circulation. I would take it back to the dealer and ask that they take a look at moving it for you under warranty.
2012 Chevy 3500 DRW 4X4 CC LWB LML
2016 Mobile Suites 36RSSB3
Comfort Ride 245 Hitch