Getting turned down is never a good experience. Your application for a new or used car loan has been turned down and you didn't know what to do before you applied to improve your chances of getting approved. First you need to understand why you were turned down. Go to Google and search for your free annual credit report, each of the 3 reporting agencies will by law give you one free credit report. The most important part of your credit report is how you pay on the credit you have. It is important you should give value to the fact of why you were turned down for the auto loan, in most cases it will likely be from the fact you aren't see as a good risk. In in any case getting a auto loan at all may have been a bad option for you.
Too much debt is not a good thing for your future finances. If you are still set on buying a new or used car you should plan ahead before stepping up and applying for another auto loan. Get your real credit score is as it may need help. Buy Here Pay Here financing. There are plenty of options to obtain an auto loan with bad credit from bad credit lenders but you will be paying a high rate to do so and should ideally wait until your financial health has improved.
The low down payment options are not for you, the more you can put down the better chance you have to get approved for the low rate financing you need. You goal should to have a large down payment. You need the facts to know how much money you need to borrow. You should get preapproved and have a budget before you start shopping for your new or used car, and  you should use the internet to help you to work out the payment you will be looking at and exactly how much the total cost of the car will be.
Look for  a used car and not a new one, this will cost you less over time. If the value of the car and you have a lower loan to value ratio for your new purchase costs less when you make the loan transaction there is less chance of  spending more than you can afford and scrimping and saving to pay back the loan you over extended yourself on. Co-signers can also improve your chance of getting You may have more chance of obtaining a loan if you have a co-signer willing to vouch for you and sign to guarantee your car loan.
When all is said and done you still need to proceed with a automobile loan for a new car then there are many bad credit car lenders who can find you a loan at much higher interest rates. You can also go the route of BHPH (Buy Here Pay Here) or In House Finance. These are the lenders like http://carloaninhouston.com who will accept your job as your credit worthiness and put you in a car at much higher rates. It is an option that will cost you, because if you are late on the weekly payment or miss the payment you are likely to have the car or truck repossessed and have another negative mark on your credit report.
Please remember to be sensible and save up a down payment for a car you can afford. This will allow you to get pre approved  and open you a wider selection of choices when you start to shop.