Both models are unlocked.
Install instructions are in the archive.
I hope to update this file with working flashing lights, but the model is unlocked if you wish to attempt this.
A towbar is included which replaces smalltrailer.
Credits:
Raddz Modding
Towbar 3d model and textures – Astrocylone71
Converted to GTA V – James Radley
Tug 3d model and textures – terran4627
Extra textures and convert – James Radley