Seeking recommendations for leveling a 4x2

[Kicker0927]

I'm considering leveling my 2021 Laramie 4x2. I am just wondering why people would recommend for or against it (i.e. effecting gas mileage, is it unnecessary, cause any warranty issues or mechanical problems, or any other thing I may not be considering before doing it)? Is there anything you wish you would have considered before doing it? Also, is there a specific leveling kit you'd recommend using? Thanks in advance!