Do these work as a direct bolt-on replacement?

These are designed as direct replacements for factory headlight locations. You'll want to test-fit before final installation to confirm all mounting points align with your existing brackets.

Will I need a wiring harness or adapter?

Mounting method and electrical connections are not specified — have a qualified installer confirm compatibility with your vehicle's existing harness before purchase to avoid rework.

Can I run just the DRL without the main headlight beam?

The LED DRL operates as an integrated feature of the headlight assembly. Isolated DRL operation depends on your truck's existing lighting control module and how it communicates with the new headlights — verify with your installer before committing.