I think the daylight sensor and possibly wiring to it, some are wired for it even if they don't have it.
And turning it on in the computer with a tazer or similar.
Bought a 2025 a week ago. Pretty great platform so far. Mods are going to be pretty limited at first and mostly just adding factory options it doesn't have. Auto headlights, trailer hitch, bedliner, maybe approach door handles and remote start?? Level and 35s when these tires are worn out would...