Hi to all, I'm in need of some serious advice. I drive a 2013 Chevrolet Utility 1.3D Club. Yesterday u removed the battery to assist my mom to start her car, and after reinstalling my battery the radio required a code. On the owners manual there's a card with different codes, including the radio one. Problem is once i've entered the code there's no further instructions, can't even get any key button to enter the code and no acknowledgement of whether the code is accepted or denied. Please help