Will this headlight work with my factory wiring harness?

Yes. This unit is designed as a direct OE replacement, so it plugs straight into your existing factory connector without adapters or rewiring.

Do I need to remove the grille to install this?

Removal of the grille is typically required for access, but the headlight itself bolts directly to factory mounting points — no modification to the truck frame or bumper needed.

Does this come with a bulb installed?

The assembly ships without a bulb. You'll transfer your existing bulb from the old headlight or source a replacement bulb separately to match your truck's specification.