Now, this may be a very dumb question, but I have seen some LS's with cruise, both standard and automatic, the same as my LT has.
Knowing cars, or car manufacturers as I do, I would assme that all Aveos at least 07 & 08 models have the connection in the wheel for Cruise, just don't have the controller on them because that is an option. Would I be wrong in believing this?
If this infact is the case, I would assume a cruise control switch from the dealer, maybe a fuse, and it would be, for the most, plug and play.

Now, mind you, I am not saying that this is infact the case, but seeings as the Aveo is an assembly line car, I would think that the oprions, minus the doors, would already have the options installed, just not in action. But I can't prove this. And I won't claim it to be true, which is why I am merely asking the question.