I don't think that's it, the original post says PIU and refers to "truck" while referencing the same 164-R8000 key. So, it should work, the trunk button would just be useless. I know the programming routine, and re-programmed my three regular remotes as a sanity check, although for some reason, it only honks once now when I hit lock 2x instead of honking twice. It used to honk twice before I tried programming the new key, and I did all this before I even hooked up the laptop.
I also checked every code referenced in the original post (echoing on 10/11 being switched on my vehicle as well). Pretty much everything is already set, keyless entry is set, remote start is enabled for some reason (I had asked the dealer to enable remote start when they disabled dark mode). I installed my hood switch. The only thing that's off is the 720-01-03 line in IPC as built. It currently reads 808A 0000 (assuming these 0000s are just placeholders and we're protecting this number for some reason) 2D. I tried to enter and write either B5 or 35, and it said it was doing it and then to cycle the key off and on, but it remains 2D. Is this maybe the missing link to make the new key work?
I asked the eBay seller if I'd bought the wrong one, and they insisted it couldn't work for police cars and they had to use the key + remote combo. But again, it's referenced in the first post here.
Needless to say I'm a little frustrated currently as I've put a couple hundred bucks into the parts, software, and a cheap Toughbook to do this, and I don't know why it isn't working.
I also tried enabling the compass for the heck of it under the normal IPC menu, I set it to enable and it would say enabled, but nothing was there.
Hopefully that's enough info to go off.