Do these lights use factory mounting points on the mirror?

These are designed for towing mirror integration. Verify your specific mirror model's mounting points before installation — some towing mirrors use different attachment methods than standard mirrors.

Will these lights maintain stability at highway speeds?

LED side mirror lights are sealed and mounted into the mirror housing itself, so they experience the same structural stability as your mirror assembly. No performance loss at highway speeds.

What wiring do I need to connect these?

Wiring harness and connection method are not specified — confirm your truck's mirror wiring configuration and whether an adapter harness is required before ordering.