Will this bolt straight into my truck without modification?

Yes. This assembly mounts at factory attachment points — no drilling or frame alteration required. Bolt up to the existing door panel brackets using your original hardware.

Do I need to remove the door panel to install this?

Yes. You'll need to drop the door panel to access the regulator and motor mounting points. Basic trim tools and a socket set are all you need for removal and reinstall.

Can I swap just the motor or just the regulator, or do I need the whole assembly?

This ships as a complete assembly. If only the motor or regulator has failed, you can often source those components separately — but this unit combines both to simplify the job and ensure matched wear patterns.