Do these plug directly into my factory fog light wiring?

These mount at the factory fog light locations. Verify your vehicle has factory fog lights or compatible electrical routing before purchase — custom wiring may be required if your Yukon didn't come equipped with fogs.

Will I need additional fasteners or brackets to install these?

They're designed for factory mounting points. Check fitment with your specific model year before committing — factory attachment hardware is typically in place, but test-fit first to confirm compatibility.

Can I use these in place of my factory halogen fogs without rewiring?

The bezel and switch are included, so no sourcing needed there. Whether the wiring harness adapts directly depends on your truck's existing electrical setup — if you have factory fogs, the connection should be straightforward, but verify before installation.