Do these plug directly into my truck's factory wiring?

Yes. These mount at factory locations and connect to existing factory electrical harnesses. No rewiring necessary — swap the old lights out and the new ones in.

Will these fit without any body modification?

Correct. They're designed for factory fender mounting points on dually models. No drilling, cutting, or modification needed.

Do I need to remove the wheel well liner to install these?

Access requirements depend on your specific truck's body design. Most fender light swaps work from the exterior, but test-fit your assembly before committing to fastener placement.