Do I need to remove the old brake light, or does this swap in with the existing bracket?

This mounts to the factory bracket — remove the old unit and bolt this one in place. No drilling or bracket modification needed.

Will this work with my truck's wiring harness as-is?

This is a direct OEM replacement, so it connects to the existing wiring. If your truck's electrical system is stock and functional, no adapter or rewiring is needed.

Can I install this myself with basic hand tools?

Yes. You'll need a socket or wrench to remove the old unit and secure the new one. Plan 15–20 minutes total for the swap.