Does this come with a wiring harness or do I need to splice into my factory wires?

Wiring details are not specified. Test-fit the connector at the tailgate to determine if it matches your factory harness; if not, plan for a basic wire splice or adapter.

Will this bolt directly to the tailgate, or do I need to modify anything?

Designed for factory mounting points—no drilling or cutting needed. Use the existing holes and fastener pattern on your tailgate.

What if the light doesn't work after I install it?

Check your brake light fuse and verify the ground connection at the tailgate. If the unit is defective, contact support for return or replacement options.