I'd like to buy a new car in the name of my LLC.

Does this put a credit pull on my personal credit, or is it just linked to my EIN#?

The lender has the option to pull a credit report on your personal
credit history if he would like.  That will vary from bank to bank. 
If your business has good credit, they may not care if your personal
credit is bad.  If your business does not have any credit history yet,
then chances are they are going to look at your personal credit.  You
may find someone willing to lend you money anyway, but your rates will
be very high.  I have worked around the loan industry and know this to
be true.  Here is an article that states the same type of thing.

http://www.businessfinance.com/no-credit-check-for-business-loan.htm

Please let me know if you require any further information!

Thanks!