1.Drag and drop this two file in this location : Grand Theft Auto V\mods\update\x64\dlcpacks

2.Go to this location and click edit in Dlclist.xml :Grand Theft Auto V\mods\update\update.rpf\common\data

3. add this lines :

<Item>dlcpacks:/trubuffalo/</Item>
<Item>dlcpacks:/11john11_mnav_pack/</Item>
<Item>dlcpacks:/ambulancespack/</Item>

and click save