Can you be prosecuted as a felon in Illinois for not turning the car in for repossession?

I don't think keeping a car slated for repossession in Illinois is a felony.

Yes you can it is a felony in the state of Illinois if you hide your car or any morgaed property from a secured creditor,It is called Concelment of Colleteral.Check the state of illlinos genaral assambley web site