Contempt of court in Illinois

I have a vehicle which has been written off by the creditor. I have tried to make payment arrangements but they are only interested in receiving the full balance owed or the return of the vehicle. They have attempted to serve me court documents but I have managed to avoid being served. the vehicle is at my home address in a secured parking space. Recently I received a letter stating that I the creditor would be going back to court because I have not surrendered the vehicle, I would be held in contempt of court. this is an Illinois case. What can I expect to happen next? I do not plan to go to court. Will there be a warrant issued or will they try to garnish my wages?