'06 Aveo cranks, but won't start. Running out of options

[avguy]

One thing to keep in mind is these no-start issues can be caused by multiple things, which is why systematic testing is so important. In your case, the coolant leak brings into play a possible (badly) blown head gasket. Not saying that's the case, only that it's more likely than it normally would be. And that's the reason I suggested a compression test as the next step, assuming that it won't start and run briefly on external fuel. That test would either eliminate, or confirm an internal problem, and would take you quite a bit further down the diagnostic trail.