Do I need to pull the bulbs out of these or are they already installed?

Bulbs are not included. You'll transfer your existing bulbs to these housings or source compatible replacements separately.

Will these work with my truck's factory wiring?

These are designed as direct replacements at factory mounting points. DRL function and low/high beam operation follow standard wiring. Run them through a test before finalizing installation to confirm all functions fire as expected.

Do I need to remove the bumper or grille to install these?

No drilling or bumper removal required—they bolt straight to factory rocker and support points. Hand tools and basic socket set are all you need.