I have had my 2015 double cab for about a month and a half. I am well on my way to making it look like my own. Here's what I've done so far.
Husky Xact contour floor mats
GM bed mat
GM tailgate protector
GM underseat storage bin
GM black bow ties front and rear
AVS Aeroskin hood protector
15 percent on front windows
Iron Cross Patriot running boards
Truxedo Low Pro tonneau cover
That's all I have for now. I do have Zone 2" level kit for the front that I did not get on yet. I enjoy watching this thread to see what others have done to their trucks and get ideas for mine so keep the mods coming. Here are my pics.