Does your truck have an unladen weight of less than 6,001 lbs.?
No, my truck weighs more than that.
Does this mean that I can't register it in the passenger class?
Although your truck weighs more than 6,000 lbs, you can still register it in the passenger class, if it's not being used exclusively for commercial purposes, does display any business ads, has a camper top that has one or more side windows completely enclosed, and has seats, seat fittings, and/or camping equipment installed in the bed.