I took out my stock head unit a couple of months ago and am deciding on putting it back in. Do i have to put in a certain code for the head unit to be able to work again because i remember doing something with a code when i first got the car. If i do, does anyone know how many characters i would have to put in, like 3, 4, or more. I tried searching for this but couldn't find anything so dont jump me if someone already posted this, just direct me there. I have a 2002 Pontiac Firebird by the way Thanks

 

https://ls1tech.com/forums/showthrea...light=theftloc
https://ls1tech.com/forums/showthrea...light=theftloc

 

thanks that really helped, sorry i didn't know it was called a theft lock

 

Glad to be of help.

BTW, The name is on the front of the unit. On the Firebird its below/right of the volume **** with a light next to it.