How do I replace a 'theft proof' radio in a 2002 bird?

Each radio has an internal security system. If the owner has activated the security system, there is a 4-digit code that is required to activate the radio after battery power has been lost. If the radio you bought is asking for a code, there are places on the internet (not GM authorized) where you can access dealer software to reset the code. I haven't seen a reference to a source in may years.

@1993TransAm is our Delco radio expert. Most likely he can help.

I think the point is that you won’t know if you need a code unless you power it up.