Will this plug into my car's existing wiring?

Yes. This assembly uses the factory electrical connector, so it wires directly into your Camaro's mirror control switch and heating circuit with no adapters or rewiring needed.

Do I need to remove the door panel to install this?

Access method depends on your Camaro's interior layout—some years require partial door panel removal, others don't. Consult your service manual or have a shop walk through it before you start.

Is the heating element tested before it ships?

All assemblies get in-house quality checks before they leave the warehouse, including electrical function validation on the heating and motor circuits.