I just bought a 2004 Escalade Base in August and am having to do a lot of repairs. I have not yet had to disconnect the battery. If I do and I anticipate I will soon, will I have to put in a code to the radio to make it work again? The radio is the regular Bose Y91. Not the Nav radio. I do not have a code that came with the truck; however, the radio is original to the truck. Thank you in advance.