how do you contact a dealer on here iv messaged and emailed several times and get no response
I look the dealer up on the web and call them. E-mail is not a reliable way to communicate with car dealers.
How do you find out who the dealer is? On the page that I am looking at for the truck i am interested in it does not have the name of the dealer.
Usually the ads have the dealer name. If they don't contact you I would move on. There are lots of cars for sale out there.