Will these headlights work with the factory wiring harness?

These mount at factory points, but electrical compatibility depends on your truck's connector type. Verify your harness matches the projector unit connectors before final installation.

Do I need to remove the factory grille to install these?

Factory mounting points are accessible without major disassembly. You may need to remove the headlight trim bezel to access fasteners—consult your service manual for exact steps on your model year.

Can these be used as-is or do they need adjustments after install?

After installation, run a headlight aim check. LED projectors should point slightly downward to avoid glare. Most shops can adjust aim in minutes with standard headlight tools.