Springs!! It rides firm, however coming from a 2001.5 with the camper option we are use to that. It is very solid feeling!!! I will live with a firm ride empty for the nice ride with 3000-3200 lbs(hitch, boxes and pin weight) in the bed when towing the 5th wheel. I am currently running 48 lbs cold in the rear tires empty and 60 in the front empty or loaded. We have the LT275/70R18's. The 20's might ride even firmer! I did not like the looks for the Laramie 20" rims anyway and did not want the drop 1.2K extra for them or .995K for a sun roof we did not want. Truck came off the lot with everything on our list except the 5th wheel prep(which I did myself) and had Nav which was not on our list. We however happy that it has the Nav now that we have it.
So are you getting monotone paint or the Silver on the lower panels. We did not know when we bought our Deep Cherry truck sight unseen that it was two tone, however we really like it.
We like the keyless entry to go also. The upgraded sound system with sub-woofer was part of the 2015 Laramie package and sounds great! I did take apart the tail gate and unplug the electric lock feature. I did not like walking up to it with something to put in the bed at Home Depot/Lowes and have to go stick my hand in the door handle to unlock the tailgate.
SNOKING