How do I leave a negative review for a dealer?

Your state's dmv should have a place for dealer complaints. Or good Ole yelp or bbb.

Try google reviews since most people use google for the initial dealer search. But before leaving the review talk to the sales manager and give them a chance to fix the issue, if they dont or cant then leave them an accurate review of your personal experianceon google.

Cargurus will send you a link in email appox a week after you requested initial contact. Only from that email, you can post your dealer feedback.