Can i ask, without you just attacking and saying "the aveo is crap" what is wrong with yours? Also what is the history of the car? how much did you pay for i and where did you get it? tell us about it, what you were hoping for or expecting, etc..
If you think you'll get top dollar for trading in you aveo, you need to remember it IS the cheapest car in america, and even though most of us like it for what it is, we know its typically an entry level or cheap commuter car.
I dont know how much trouble you have had with your car specifically, but mine has only broken down twice in 25k+ miles. I've owned many cars, a lot of more expensive cars including vws, audis, etc.. As far as my experience the aveo is as reliable as most new cars if you have someone who knows how to work on it (not every gm mechanic can even though it is badged gm).
I think the consensus here is the aveo is a good value, fun to drive car that you can fix yourself. As a group we are all helpful and friendly, if you didnt come in with your "attacking" posts you might get more helpful responses.
As for JD power, and Consumer reports:
consumer reports just spits out figures of complaints. Now, does everyone with a car that breaks down complain? NO, it also seems that other dealerships have a better ability to appease the customers, GM on the other hand it really depends on the dealerships. Some are so big that they dont care for the little guy with the cheap car.
JD power is fully based on first impression, and while that is important, it is really not a view of ownership. It is also really hard to give the aveo a decent review for what it is when you just got out of a $70k car (or similar). Think about it, its like going to a 5 star hotel and then staying in the ecolodge.