Will these bolt up to my truck without drilling or modification?

These mount at factory locations — no drilling required. Bolt directly to existing mirror mounting points on your Ram.

How do the power and heat functions work independently?

You control power adjustment and heating separately. Adjust mirror angles with the control switch, and activate heat with its own button. Either function runs without triggering the other.

Do I need to run new wiring, or do these plug into existing harnesses?

Wiring harness connection depends on your truck's factory setup — verify your Ram model's electrical configuration before installation to confirm plug compatibility.