<prompt> Human: So my fiance is looking to purchase a new vehicle and trade hers in. Before we met her credit was terrible and she got a bad rate on her current vehicle. Her interest on her loan is around 17.5 and she still owes 13000. She tried to get it refinanced but was denied due to the cost of the loan vs worth of the vehicle.Her credit is better now but still has a ways to go so I was going to cosign for her to help her get a better rate. The vehicle she is looking at we can get for around 20,000 and they offered her 9000 for her trade in so that would put the extra 4000 still owed on to the new loan.With me cosigning for her she can get an interest rate of 8 on the loan. Is this a good idea to help her get out of the terrible rate she has for her current loan? She is able to afford the new payment without much trouble. Is it better to try to pay off the original loan or just roll the remaining balance into the new loan? We also talked about her paying extra every month if she purchases the new vehicle to get the balance down and maybe refinancing in the future.Any tips or advice would be appreciate.  <response>: Do not cosign for her. Even if you did, 8 is really high on a car loan. What is the car she has now worth private party? Sell it and then pay down what she has left over. 