Yep. You're likely to get a handful at once, once your dealer begins the financing process.
The good news is, collectively they won't have any more effect on your score than one would. And is is possible that the result will be financing that wil beat your Captal One offer, but even if not, you'll get the offer made to you by Capital One in the end.
The dealership cannot run your credit until you provide a SSN and such, so if you're just looking, simply refuse to provide that information until you've chosen your vehicle.
But to close your deal - using Capital One or not - they have to run your credit, which will generate the muiltiple hard pulls. These should all be coded as "auto lending" inquiries, though, which means that all together they have a single-pull impact (you won't have the same sort of score impact as you would if, for example, you applied for seven different credit cards).
