Does this mirror use the factory mounting holes?

Yes. This mirror mounts at factory rocker and door-frame points — no drilling or reinforcement needed. Use OEM fasteners or equivalent hardware rated for your truck's door assembly.

What do I need to do to wire the power and heat functions?

The harness connects directly to your truck's existing power mirror circuit. If your vehicle came from the factory with powered mirrors, you can plug and play. Consult your truck's electrical schematic to confirm correct pin mapping before connecting.

Will the mirror stay stable at highway speeds?

Factory-style design and mounting are engineered for full-size truck speeds and wind loads. Once adjusted and locked, the mirror maintains position during normal driving. Test your adjustment before committing to long trips.