Do these mirrors mount directly to my existing mirror brackets?

These are designed for OEM factory mounting points. Test-fit against your current setup before final installation to confirm bracket alignment.

What do I need to wire the LED lighting?

Wiring specifics aren't detailed in the product specs — you'll want to confirm power source compatibility and harness requirements with your truck's electrical system or a shop familiar with your year and model.

Will these add weight compared to stock mirrors?

Hard panel construction with integrated LED will be slightly heavier than OEM mirrors, but the added durability and lighting function offset the minimal weight penalty on heavy-duty trucks.