Will these work with my truck's factory electrical system?

Yes. These are direct replacements that use your OEM connectors and wiring harness with zero modifications. Plug them in and you're done.

Do I need to buy bulbs separately?

Bulbs are not included with these assemblies. Your existing bulbs will transfer over if they're still good, or grab replacements at any auto parts store.

Can I install these myself?

Installation is straightforward for anyone with basic hand tools. Disconnect the factory units, unplug the connectors, swap in the new headlights, and reconnect. No special equipment or welding involved.