The amount you still owe on your loan for your current vehicle will go towards your new loan and we will refinance the amount that is left.
For example: You still have 8000$ on your current loan. We offer you 6000$ for your current vehicle. Your new car that you want to finance is 20 000$, we will take the 2000$ remaining on your current loan and add it to your new purchase that's 20 000$. So your new loan payment will be based on 22 000$.