[fred cook]

It would help to know what year your car is. However, assuming that you are refering to the a/c controls, they are held in by way of a nut on the switch shaft. Pull the knobs off and you will see the nuts. They have two slots in the front face rather than being a hex shape. Normally, you should be able to use two small flat blade screwdrivers to remove them. I put one screwdriver in a slot and use the other one as a lever with the switch shaft as the leverage point or fulcrum. Hope this helps.