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I will just state that if you go with any HID setup that is not OEM that I recommend wiring up relays so the power is not ran thru the factory harness and fuse box, I have ran HID's for practically 2 decades and eventually they will melt a factory fuse box, might not appear for some time but eventually.... just my 2 cents.
on the 2018's I don't know, I would look at what you have already and see if there is any factory option for HID already present there may be a different plug sitting there not used I really don't know on the NEW trucks haven't played with any of them as yet, maybe check in your underhood fusebox also and see if there is anything marked HIDThx much. Will the OEM HID components be a simple plug n play with the halogen or do I need a whole new headlight housing and plug?