Financing 1st used car w/ cs of 630; any posibility I could be denied a loan through the dealership?

I just picked up a new FT job that will definitely be able to pay off the expenses of a car. I will start work around next week and I'm required to have a vehicle, so I'm quickly looking for one right now. Problem is, I don't have much cash saved(around $500 now) so I'm looking to finance, just curious if any of the dealerships might deny me for any reason of me being 19 years old, living within city limits, etc.