When you file bankruptcy you discharge your liability on unsecured debts (with some exclusions, for instance, taxes or student loans) and secured debts. Due to the lien on secured assets, you need to keep paying on the debt to keep the property, but your liability on the debt is discharged through your case. As long as you have not signed a reaffirmation agreement in the bankruptcy, you can surrender your filed secured assets back to the lender during or after bankruptcy, and not be liable for any balance owed on the loan, due to the discharge. This is the same regarding involuntary repossessions as well, if after filing you fall behind on payments and have a repossession, you will not be liable for the balance, due to your bankruptcy discharge.
