http://www.oklahomaautoloan.com/oklahoma-loan/

what happens if i can’t pay back a loan in the state of oklahoma?
State law is not very different regarding non-payment of a loan. You have made an agreement to abide by a set of terms, if you break that agreement the lender may use any and all legal means including a collection agency, repossession, tarnishing your credit report, and even legal remedies including levies, and liens, to recoup their losses.
Texas Legislature Gives Final OK to Physician Loan Repayment Program, HB 2154