a/c pass side cold driver side warm air

This is very likely a problem with your air direction doors in your Automatic Climate Control System. You have a Computer that controls all of these functions. When you push the temp setting arrows up and down, you are really changing the settings in your Climate Control Computer. I would have your Climate Control Computer scanned by a good shop to see what action needs to be taken. http://repairpal.com/cadillac-repair-in-west-chicago-illinois