Will these bolt to my factory mirror mounts?

Yes, these use factory mounting points — no drilling or bracket fabrication needed. Bolt pattern matches OEM locations directly.

Do the heaters work independently or with the mirror motors?

Heaters operate on a separate circuit from the adjustment motors. You can run the defroster without moving the mirrors, and vice versa.

What electrical connections are required?

These tie into your existing mirror harness — no new wiring runs needed if your truck has factory power mirrors. Heater draws minimal amperage on a dedicated circuit.