I programmed VATS out of an impala last night,and afterwards the radio was locked.
I'm not sure that I necessarily triggered it (I only changed VATS) and doubt I did but am curious.
It is a 2001 impala,and i've been trying to learn more about theftlock to try and help get it unlocked.

Car has bcm issues,and I haven't got a straight answer whether it worked or not before really.
Does anybody know exactly how it works?
From what i've gathered it receives ViN info from the data bus and if it's serial key isn't correct than locks down.
(the owners manual said as much).
I'm wondering if the bcm is sending a corrupt vin signal,and that is why it triggered a VATS fault and now theftlock?

He texted me that he tried the instructions from online to get unlock code and it didn't work.
I have seen where some have said that it must be done at the dealer with presumably a tech2.

Any more info on this,as technical as you want to be,would be appreciated.
If I can unsolder/solder a jumper to get it to work that would be fine even.

I'm heading up there in a bit,While I doubt it will do anything i'm bringing my tech1 with me. It's updated to 2001,but that doesn't mean i'll have the capability.

Thanks for any insight.