Devin Weston's trailer from GTA V.

Use https://gtaforums.com/topic/896795-1000-1080-zolika1351s-trainermod-menu-rewritten to attach the trailer to a truck

Vehicles.ide:
tr4, tr4, car, PHANTOM, PHANTOM, VEH@TRUCK, NULL, 10, 999, 0.3532, 0.3199, 0, 2, 1.5 ,1, noboot+big+avoidturns

txdp:
vehshareV, vehshare
tr4, vehshareV

Tow offset for trainer (with Phantom truck):
X 0
Y 3
Z 0.4