Does this mirror mount at the factory attachment points?

Yes — these mount directly at the OEM rocker points with no drilling or modifications needed.

How do I wire the heating and power functions?

The mirror connects to your truck's existing electrical harness. Run the wiring through the door jamb and into the dash where your factory mirror connector lives — consult your service manual for the exact harness pinout for your model year.

Will the mirror stay stable at highway speeds?

These are built to the same structural standards as OEM mirrors — stability at speed is not an issue. The powered adjustment mechanism is solid enough for towing and normal highway use.