GM Repair Problems? Ask GM Repair Expert Now.
OK, lets start from the begining. lets make sure you are doing correctly. the procedure for unlocking the radio as follows, you need to get a 6 digit code retrieved from radio then post me back this code, I will post you back a factory backup lock code that will enable you to punch this code in to unlock.
following these instructions, let me know what happens.
Press and hold push buttons 2 and 3 until a three digit code appears on the display.
Write the three digit code on a piece of paper.
Press the AM/FM push button, a three digit code will appear on the display again.
sorry we couldnt help, I wish I had ask from the start if this one the orginal radio. could have maybe save you some headaches.