Do I need bolts to secure this to my hitch?

Bolts and hardware are not included with the step itself. You'll need fasteners rated for a 2-inch receiver hitch to mount it securely—check your hitch manual or visit a hardware store for the right grade and size.

Will this work on a truck that already has a bumper hitch?

Yes, as long as your bumper hitch is a standard 2-inch receiver. The step slides in and bolts down the same way. If your receiver is recessed deep in the bumper, you may need a spacer or extension tube to bring the step to a usable height.

How much weight can this step handle?

Weight rating is not specified—treat it as a helper step for reaching high cargo or roof racks, not as a platform for sustained heavy loads. Test your full weight before relying on it regularly.