Aveo junk blame the congress for passing a law the requires tpms in all vehicles after 2008.. a feature that is sitll crude in design.. All because americans are stupid and lazy and dont check tire pressures. and <blank> number of people died due to under inflated tires... this is not just an aveo problem, my 08 chrysler t&c does this, my audi did this, and a lot of people have this same problem. its is as paul said air pressure changes with temp, as well as moisture in the air, (nitrogen has no moisture).

i suggest you get nitrogen in your tires if the problem persists, its @ $34 for the swap i believe locally. And might cure this issue for you.

if this was a vag car you could disable it or change the parameters, but i have a light because i wasnt going to shell out another $300 for the aftermarket rims to get tpms.. ill pull the bulb.