looking for radio unlock codes

We just bought a 99 Intrigue. My husband changed the battery and now the radio will not work because the Theftlock Unlock Codes are unknown to us. I have looked on line, but they all want money. Are there any place where I can get these codes free of charge. I imagine we will go to a GM dealer, but the cost is $35(cdn). Any help will be appreciated. Thanks

Have you looked in the owners manual? It is usually something like 1234, 1111, 2222, etc...