Yes
If your modified or unmodified pickup truck has a curb weight of less than 6,001 lbs. , you can register it in the 'Passenger' class if it meets the following conditions:   the truck doesn't have any commercial    the van is used exclusively for non-commercial purposes
and these modifications are made under what regulation?
Part 106 of the DMV Regulations describes vehicles that are registered in the 'Commercial' class and in the passenger class. Part 106 also describes how some modifications you make to your vehicle may affect the correct registration class of your vehicle.