99 cavalier stereo lock?

i braught my car into the shop today to have a recall fixed in the stearing column. when i picked up my car the stereo wont work. it says "loc" . i didnt realize it but i guess i have a lock on my stereo, and i guess they turned it on . . . does anyone know how to turn this lock off???

take it back to the garage and they could do it for you.

you will need the unlock code. If you dont have it you can probably get it from a dealer. Or maybe someone on the forum knows what it is on your car