in most situations you will have to take it to a certified Saturn or GM service center..it sucks i know Saturns aways have to be complicated in some way..i own one myself...before you do so i would call and get a quote b/c you might be charged a service fee of upwards to 50 bucks..and in that situation i would check your finances out and just buy a new stereo and install kit...chances are your stock stereo will lock up on you again...and then you will need to go through this all over again and spend more money