Will the bulb work with my existing wiring harness?

Yes — this assembly uses the factory connector type. Your existing bulb and harness will seat directly into the new housing without adapters or splicing.

Do I need to remove the grille to install this?

No. You'll access the assembly from behind the grille opening without removing it. A screwdriver and 10 minutes is all you need.

What's the return window if this doesn't fit my truck?

Test-fit the assembly before fully securing fasteners — mounting points are factory standard, but physical fitment should be confirmed on your specific year and model before final installation.