I don't know if its the same as a camaro, but if it is I'm willing to try it. My grandfather had a nice alpine deck in his 2nd car (geo) he's selling so I took the alpine deck for my camaro. When I put the stock deck in, it is locked and he cant find the paper with the code. The dealer wants like $50 to unlock it, and I know it will take 30 seconds, so what can I do. It's the AM/FM/Cassette from a 93 Geo Tracker.

 

Try this

Theftloc Bypass

1. Press and hold presets 2 & 3 for about 10 seconds until the first 3 digits of the display code are displayed
2. Write the numbers down.
3. Press the AM FM button, write down the next 3 numbers
4. Call 1-800-537-5140, when asked, enter 202107, press the “button” and enter the 6 digit code from the radio, you will get an unlock code, write it down.
5. Go back to the car, press the HR button and set the first 2 numbers, then press minute button and set the next two last numbers, press AM FM button, SEC should be displayed, turn on radio
To remove customers code, repeat step 5. you should see --- on radio face, the code is now out of the radio.