I have a 2006 Grand Prix GT i was wanting to put a aftermarket stereo in it. BUT my DIC would not keep the proper date and after more research my clock in the stereo was not set properly. The AM PM was switched and now the date is fixed.My question is if i put a aftermarket stereo in will the date be messed up or will it still work cause i think the date part anyway goes through the stereo. Thanks for any help on this.