I have a 2010 Cobalt LT 2.2 i bought a couple months ago. Since day 1 i have had issues with the a/c not cooling properly, took it back and they said everything was fine. Then i decided to check the pressure using my guages from when i worked in a shop, and i added about .2 lbs of freon bringing the total to 1.1 lbs. A/C worked great until i took it back to have a new headliner and door panel installed. They checked the system again and told me it was overcharged, evacuated it and recharged it to .9 lbs. A/C was crap again until a added about .2 more to it. Anyone else had this problem with their a/c?