Do I need to pull the bumper to install this?

Depends on your comfort level and tools. Many install without bumper removal by accessing from the engine bay, but removing the bumper gives you cleaner access and faster install. Check your service manual for your vehicle's specific approach.

Will this work with my factory wiring harness?

This assembly is designed as a direct OE replacement, so it should match factory connector type. Test-fit the connector before finalizing installation to confirm compatibility with your existing harness.

What bulb does this take?

Bulb type not specified with this assembly. Consult your vehicle's service manual or the original headlight documentation to identify the exact bulb configuration for your model year.