The easiest way to find car dealers open on Sundays is to contact different dealers directly and ask about their hours of operation. Sites such as Yelp.com, Autotrader.com, Yellowpages.com and Cars.com allow users to search for and contact various dealers throughout the country.
Yelp.com is a local business review site that features a search tool for finding a specific business or business type within a given city and state or ZIP code. When a user searches for car dealers on the site, she receives a listing of different dealers within the specified area along with a map display of their locations. Each listing includes the dealer's website and phone number, with many listings also containing the hours of operation of that dealer. If the dealer is open on Sundays, then this section includes the hours for that day, otherwise the hours appear as "CLOSED," as of April 2015.
Autotrader.com and Cars.com feature search tools exclusively for finding used and new car dealers. Though listings on the site don't contain the dealer's hours, they do feature contact information. Many dealers list their hours on their websites, either on the main page or on a Contact Us page. If the site doesn't say whether the dealer is open on Sundays, the user needs to call it and ask directly.