purplepotatoes14

You only found "<audioNameHash />" because the vehicle doesn't need the sound to be changed, i.e. it's the default setting. Yes, you need to replace it with what I said. This also applies to any other police vehicle you want to change the sound for, just replace "ambulance" with whatever vehicle you want (police, police3, sheriff2, etc). Keep in mind, "audioNameHash" also changes the engine noise too.

Well, if you're talking about GTA 5, you need to change the "audioNameHash" in the policeold1 slot to "ambulance". (Example: <audioNameHash>ambulance</audioNameHash>)

Arrest Manager by Albo has this feature.

This is gonna be awesome! This'll definitely spice up everyone's (well, whoever has the keyboard at least) patrols!

The PA quotes only work, at least in my case, if your character's voice is set to a "full" voice, not "mini". You can set voices in the "model spawning" section then "voices" at the bottom in the Simple Trainer, I believe.

Yeah, it was difficult getting an acceptable video of it taking off. I tried to find something that was slower, not someone flooring it all the time, but that's what most of the videos are. Also, those video clips aren't too bad, I may consider using them and attempt to make a better, higher quality sound. The problem that I was having is that when I try to make the engine noise louder in Audacity, GTA 5 would distort it. The video I posted is the loudest I can make it without it sounding awful.