Help with sirens

My firetruck and tower truck have normal police sirens but the stock GTA firetruck has the real fire siren, Do i need to change something in the metas to fix this or what?

That did’t work, Any other suggestions?

Did the siren change at all? Try opening your vehicles.meta file and finding your audioNameHash entry for your trucks, changing it to this:

<audioNameHash>firetruk</audioNameHash>

It is but still no fire sirens

same issue, audio hash isthe stock fire truck but only the stock has the siren