How much does a semi truck without trailer weigh?

The weight of the truck depends on the size. If you have a semi truck with a trailer it will weigh less, rather than if it had the trailer it would weigh more.

If you have a large engine than it will have less space in the interer and less space inside. If you have bunk-beds than that will take more space, and so on.

So really it all depends on the brand,( for interer) size, and truck check.