I'm having major issues with the cooling system on our 2004 aveo and before I rip into it again I want to eliminate the possibility of air in the system. I want to make sure I'm "burping" the system correctly. Does anyone have a service manual they could email me? Or at least the section on the cooling system. All I've been doing is running it till hot with the heat on with the expansion tank cap off. I'm told there may be more to it than this...