I was wondering if anyone knew why our 08' Impala does this. I noticed it today while leaving the gym. I tried turning on the A/C because it was a little stuffy in the car. I wanted to cool down a little from my workout. When I press the A/C button to turn it on it just blinks a few times then turns off. On our previous LTZ I do recall my son saying that it would sometimes to the same thing. I haven't had a chance to look in the manual to see if it talks about it. Just thought I would post the question here. Does it have to be a certain temp before it'll allow you to turn on the A/C? I'm hot natured and often turn on the A/C.