Do these mirrors use the factory mounting hole pattern?

Yes—they mount directly at the factory attachment points with no drilling or bracket modification required.

Will these stay stable and vibration-free at highway speeds while towing?

They're engineered for trailer duty and designed to maintain solid positioning through vibration. Power adjustment keeps them locked once you set them in-cab.

What electrical connections do I need to make?

The mirrors wire into your factory harness for power, ground, and signal—no cutting OEM wiring. Consult your vehicle's service manual for the exact connection points and any relay requirements for the heating circuit.