The air conditioning will stop and start blowing warm air. The service dept. where we bought the car says that when the car is under a load, it will kick out and that it is a design problem with the 3.6 engine models, and there is nothing we can do to fix it. It does this whether you are driving down the road or stopped, I find this totally unacceptable.
As far as the rest of the vehicle, we love it except for the air.
I work on these cars for a living (for how long?) and I have never heard of this problem being a design flaw with the engine. I think you should find a different Saturn dealer or see if you can take it to a different GM dealer, Malibu and G6 same car under the skin.
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