What vehicles does GM make money on?

I've read before that small vehicles, such as the Aveo and Cobalt, don't directly bring in revenue by themselves, but exist so a customer will hopefully "step up" into something that will bring GM money later on, or to satisfy dealers when they don't have a small car to sell . But then again Cobalt sales and transaction prices are way up.

I DO know that traditionally, pickups and SUVs were a good money maker. Even with sales are far down as they are is money still being made? How about like H2's?

How about like the SAABs? Uplanders? ASTRA's? G8's?