Which debt should i get rid of first?

i have two car loans out that equal out to about 29,000 bucks and then out of like revolving credit i have about 8,000 dollars worth... im in a position to pay off one of my vehicles... basically i have 3K to throw at my debt. do i throw it at the vehicle (installment loans) or towards my revolving credit (credit cards and department cards) debt? im looking to better a decent credit score to a good credit score. which would help more?