Does this mirror use the factory mounting holes?

Yes. This mirror mounts at the original factory points — no drilling or door panel modification needed. Install is straightforward with standard hand tools.

What does the heating function run off of?

The heating element ties into your vehicle's existing electrical system through the power mirror connector. No separate wiring harness required if your truck already has powered mirrors.

Will this mirror stay stable when towing at highway speed?

Factory construction maintains proper rigidity and vibration dampening at highway speeds. Power adjustment locks the mirror position securely once set — no drift or flutter during towing.