I have an 09 Aveo that I can not get the ac to work on. There are three buttons that are together on the dash ac, rear defrost and recirculate. None of those 3 buttons work. I have replaced that entire cluster and also added a ground thinking that may have been an issue. I have also checked all fuses and relays but have had no luck. Today I did test ac pressure with the ac clutch engaged by jumping the relay and it was very low, however I feel that even if this has to do with a low pressure switch it shouldn't affect the rear defrost and recirculate buttons. Any thoughts or insight would be greatly appreciated, I'm pulling out what's left of my hair.