Does this mirror use factory mounting holes?

Yes — designed to mount at existing factory rocker and frame points. No drilling or fabrication required.

What about the heater and LED wiring — does it connect to OEM harnesses?

Heating and LED circuits require integration with your vehicle's electrical system. Refer to your truck's service manual for harness routing and circuit breaker specifications.

Will the mirror stay stable at highway speed while towing?

Manual adjustment locks into position once set. Test your mirror angles under load before committing to extended towing runs, especially in crosswind conditions.