Stock Deck in 2002 Grand Prix Wont work after taken out and put back in. Why?

Question

I got a new deck, put it in, and it didn't work. I put the stock deck back in and it didn't work either, but the lights on the deck still illuminate at night. Is it a short or something else like an anti-theft mechanism?

Car: 2002 Pontiac Grand Prix GT

Answer 1

You are correct about the stock deck it probably has a anti theft built in.

When you removed it and then tried to put it back you need the unlock code to make it work again.

Your owners manual should have this information if not call the dealership and they should be able to give it to you.

Not sure why the new radio did not work.