Will this mirror bolt directly to my truck without modification?

Yes—designed to use factory mounting points. No drilling or bracket fabrication needed.

Does the heated element come on automatically or do I control it?

Mirror includes a heated glass element, but control method (switch location, auto-engage) depends on your truck's wiring configuration. Consult your vehicle's wiring diagram before connecting power.

Can I use this mirror if I'm towing a trailer regularly?

Yes—the mirror is rated for towing duty and the signal light improves visibility when changing lanes or backing with a trailer. Extended glass area gives you better sight lines on the passenger side.