Basically, this removes the annoying blacked out windows which sometimes get applied to cars when you replace them. This does not change every vehicle, only emergency service vehicles (plus a few others). There is a full list in the download, but if you want more adding, please let me know the specifics in the comments of this post or in my discord.
WARNING: ANY ADJUSTMENTS PREVIOUSLY MADE IN YOUR VEHICLES.META WILL BE WIPED! USE AT YOUR OWN RISK, AND BACKUP YOUR VEHICLES.META BEFORE HAND.
Installation:
update/update.rpf/common/data/levels/gta5/
Drag and drop the vehicles.meta from this file into the same directory.
Credits:
tramter