I purchased a used 1996 Cavalier and I believe the radio/theft needs to be unlocked and I have no manual on this car. I purchased for my daughter so you can imagine how upset she is. Noone seems to be able to help me at all. I go to the dealer and they want to charge me 80 for a user manual or to come and have them do it. I cannot afford to do this since I am a single mom. Is there a way to get the codes? Help !!!!!!!!!!!!!