CHEVROLET IMPALA AIR CONDITIONER SWITCH

Hi, Just Wondering Where Is The A/c Power Switch Located At On My Car?

I Have An 06 Chevy Impala And When Running The Ac Is On Normal It Makes A Ticking Noise And It Seems To Be Coming From Behind My Glove...

If I'm Driving Down The Road With My Air On An Say I Turn The A/c Off (but Leave The Fan On) It Starts Knockin Over By Like The Glove Box...