Adding Freon was a bad idea, but we did not add that much. We also recovered more than we put it after it started acting weird. Brought it to Chevy and it was still over charged. Guess it was over charged in the first place from the factory. They recovered all and pulled a vacuum and recharged to spec and now it works like it should. The Dual Zone Auto A/C is just something I have to get use to if you never had it I guess.