I have a 2000 Cheverolet s-10 it has a delco cd radio. I do not know the unlock code. I purchased this vehicle from a friend who didn't know the code either. It has a code for inOP I know I have to leave the ignition on for 1 hour and I will only have 3 tries to use the right code. I just want to know how to reset it so I don't have to get a aftermarket radio.

All tne codes are different, go to the dealer for a reset and write it down.