Wish I had seen your post sooner, you've probably taken delivery by now.
Slides, slides, slides!! Since Evergreen is gone, you have no warranty. If you buy a good service contract, it should cover most of what the warranty would have. An exception, at least in our case, is adjustments.
Assuming that you bought it new, insist that your dealer perform any needed adjustments for at least 90 days at no charge. I would suggest that you immediately take a several hundred mile trip that includes some rough roads and ends up back near your dealer. That should give you a pretty good shake down and root out your initial issues.
'15 Lifestyle 39 FB '15 RAM 3500 Laramie Ltd MegaCab 4X4 6.7L Cummins, Aisin trans, 4.10 gears Andersen Ultimate