I know this post is old but I have some new info...

My son just purchased a used 2006 Aveo5 last week with low kms. I found this link after he texted me and told me he couldn't get his key out of the ignition. Thanks very much! I found the GM part number listed in the first thread has been superseded by an new one. The new part number is 94568533. The part runs for about $23 on Rockauto or $50 here in Canada at parts monkey. We are going to have a look at the switch this weekend to see if the tabs are broken and maybe do a quick fix until the parts come in.