hey guys I am from Canada, I don't quite have an Aveo but a Suzuki Swift, car from what I understand and see is almost identical.
I have to say that I love the looks of these cars, I just got rid of my AWD Matrix which was not as fuel efficient. So I bought this Swift, 5 speed with 126k kms on it. From a garage that had replaced the head, timing belt and water pump. I have driven alot of these 5 doors lately and found this one to be the best for my needs. It is quiet compared to the Toyotas and Kias I drove. Reason I joined here is because I can't find any solid forum regarding the Suzuki most are the UK or Asian versions which dont appear to be the same.
I actually own a "not quite Swift" - an old Pontiac Firefly (Geo Metro clone). That's the platform some of those other Swift forums are about. Then there was another Swift version that we never got here in Canada/U.S. That name gets around. Confusion!
Sounds like the timing belt probably broke in your car and they repaired it.