How to send an email notification to an email address based on user selection?

The form would need to send to the correct dealer based upon the clients zip code.

Is it possible to have a form send the response to the right dealer based on zip code?

Yes this is possible to do with JotForm, you only need to follow this guide, there you will find the steps to achieve it: http://www.jotform.com/help/167-How-to-send-to-a-specific-email-address-based-on-a-selection.