Do these bolt straight to the existing mounting holes on my truck?

Yes — these mount at the factory rocker points and use OEM bolt locations. No drilling or frame modification needed.

Will the LEDs work with my truck's factory wiring harness?

These are plug-and-play assemblies designed to connect directly to factory wiring connectors. If your truck originally had incandescent housings, the electrical draw is different; test-fit and verify function before final install.

Do these come with bulbs or just the housing?

You're getting the complete LED assemblies — the lights are built in. No separate bulbs to purchase or install.