Do I need to tap into the factory wiring harness?

Yes. This light connects directly to your existing brake signal wire at the factory location — no new circuits needed. Use a weatherproof connector or solder with heat shrink for a permanent connection.

Will this fit the same mounting location as my factory light?

Designed for factory mounting points. Test-fit the assembly against your tailgate to confirm alignment before final installation — some trucks may need minor bracket adjustment depending on wear or prior modifications.

Does this come with a bulb or is the LED permanent?

The LED elements are built into the assembly — not a replaceable bulb. If an LED fails, the entire light would need replacement rather than a simple bulb swap.