Will these lights work with the existing wiring harness?

Yes. These mount into factory positions and use the stock connector — no rewiring needed. Plug them in and you're done.

Do I need to remove the bumper to install these?

Removal depth depends on your specific model year. Access is usually straightforward from inside the cargo area or from the outside depending on body style — no drilling or cutting required.

Are bulbs included with these tail lights?

Bulbs are not included. You'll reuse the bulbs from your original tail lights — they drop right in.