Quote Originally Posted by st8kfinger View Post
my friend payed a dealer to unlock his z28's radio 5 times, he said they felt sorry for him or something and gave him a universal gm unlock code because he was always unhooking the battery when doing mods???? if thats true you might try to google it
It's not that simple on the radios in question. However, once the vin is programmed to it you won't have anymore trouble unless you switch it to another truck.