Yeah, I think he said 105k miles on his first Aveo.

I agree with your take on the overheating time being suspicious.

I speak from experience - warped & cracked the head in an '86 Civic when the head gasket blew in heavy, fast traffic in the left lane of the freeway near Toronto. Couldn't just stop. Even after I got over to the right, I pushed it further than I should have because I knew there was an exit coming up & I wanted to be off the freeway. Probably went a couple of km from when I saw the plume of steam from the exhaust.

No great loss. I think I paid $265 for the car.