I bought an old 2000 Silverado 1500, and was able to successfully unlock the radio using the normal procedure found online (https://www.autoblog.com/2016/06/15/how-to-unlock-a-chevrolet-theftlock-radio/)
If your radio is locked, “LOC” is displayed on the screen.
Step 1: Press buttons 2 and 3 at the same time and hold for 8-10 seconds. Write down the three-digit code that is displayed.
Step 2: Immediately press the AM/FM button. Another three-digit code is displayed. Write it down as well.
This is your six-digit radio serial number.
Step 3: From any landline or cell phone, call the toll-free GM Radio hotline at 1(800) 537-5140.
Step 4: When it requests a code, enter “106010” on the keypad, followed by the pound (#) sign.
Step 5: You will be prompted to enter the radio serial number you have just obtained.
At the prompt, enter the number followed by the pound sign.
Step 6: The prompt will read out your four-digit radio unlock code. Write it down precisely.
Step 7: Turn your ignition on and press the radio power button. Your radio will display “LOC.”
Step 8: Press the hour button on the radio to enter the first two numbers of your radio unlock code.
Step 9: Press the minute button until the last two numbers of the radio unlock code are displayed.
Step 10: Confirm the code. When the code matches, press the AM/FM button. “SEC” will display on the radio, indicating a successful attempt to enter your radio code.
I had to disconnect the battery to do some repairs, so of course the radio locked again. Now when I try calling the radio unlock number ((800) 537-5140) I just get disconnected, or told the call couldn't be completed. Can anyone else test that phone number, or suggest another way to unlock the radio?
Worst case scenario I'll throw an aftermarket radio in, but I'd like to keep the price down as much as possible.
