If you are considering voluntarily surrendering your vehicle, you should be aware that you will likely not be able to get it back. You should also be aware that you may be responsible for any deficiency balance, which is the difference between the amount of the debt and the proceeds of the sale.
If you are struggling to make payments on your vehicle, you should contact your lienholder as soon as possible. They may be able to work with you to make a payment plan that you can afford. You may also be able to get help from a credit counseling agency or a bankruptcy attorney.