Will these mirrors work with my truck's existing electrical system?

These are designed for direct integration with factory mirror connectors. Verify your vehicle's mirror harness matches the connector type before installation — no adapters are included.

Do I need to run new wiring for the heating function?

Heating circuits tie into your truck's electrical system at the factory mirror points. If your vehicle already has heated mirror wiring, installation is straightforward; if not, you'll need to run dedicated power from the interior to the mirror junction.

Can I use just one mirror, or do they have to be installed as a pair?

This is a pair assembly — both driver and passenger mirrors are included and calibrated together. You can install both or either one, but they're sold and spec'd as a matched set.