I recently pulled my radiator on my 2005 Aveo LS Hatchback and it has A/C. I really don't see much difference but then again this based on the images from RockAuto. What could be difference would be maybe the radiator wider and uses longer hoses since it has no condenser? Here is the link to RockAuto. 2006 CHEVROLET AVEO 1.6L L4 Radiator | RockAuto

I'm assuming your car is a 1.6. Maybe you could post pictures of the old one and see the difference you are talking about?