Install:- 
1- by using open iv go to 
Grand Theft Auto V\update\update.rpf\common\data 
and edit dlclist.xml then add this line 
<Item>dlcpacks:\lamboo\</Item> 

2-put lamboo folder in Grand Theft Auto V\update\x64\dlcpacks 

to get vehicle in game use any trainer (example simple trainer) and search by write lamboo