Do these mirrors use the factory mounting holes?

Yes—they bolt directly to your existing mirror mounting points. No drilling or welding needed.

How do I wire these into my truck's electrical system?

These mirrors are designed for hard-wired installation into your vehicle's power distribution. Run power and ground to your fuse box or relay panel following the included wiring diagram. If you're not comfortable with electrical work, have a shop handle the integration.

Do the heated elements stay on all the time?

Most factory setups tie the heating function to a dash switch or automatic sensor that activates when temps drop. Your vehicle's existing climate controls determine when the heating engages—these mirrors integrate with that system.