I see you're new. so i'll be easy on ya
one...there is a sub-forum dedicated just to lifting trucks. You did a good job at finding A sub-forum..just not the BEST one. Still kudos for not posting it in the newbie section
two...there is a search function that works really well on here. I find it best to search "titles" only.
Don't know many guys running 6" on a 2013..but PLENTY running them on other 4th gens.
I'd be here all day if I went finding their pics/threads for you. so search around some while you wait for people to, maybe, post here.
oh and the dealer is probably gonna charge out the ass. I think ive heard Procomp is a common choice for dealerships. The only benefit I see is it stays in warranty if the dealer installs. If RCX has a kit out for 2013..they are majorly recommended on this forum for an affordable and good quality lift.
there is also zone and bds. BDS being the second favorite it seems