Do these mount at factory towing mirror points with no drilling?

Yes. These lights are designed to use existing towing mirror mounting locations. No drilling or modifications required for installation.

Will these lights work with my existing wiring harness?

Wiring integration depends on your truck's mirror harness configuration. Test-fit before committing to any permanent connections—you may need to tap into existing circuits or run new wire.

Do the bulbs come installed?

Bulbs are not confirmed as included. Verify bulb type and socket size during installation—standard automotive side marker bulbs typically fit, but confirm compatibility with your specific mirror design before ordering replacements.