I have a 2003 Deville. In March 2008, my A/C stopped working. I was told that my actuator needed to be replaced. It was replaced at that time, and the A/C worked fine for a while. About 8 months later, I began hearing the clicking noise from the dash vents that preceded the A/C failure in March 2008. When I took the car to the dealer, they told me that the actuator needed to be replaced. I told them that I just had it replaced in March. They said that this was another actuator. Are there two A/C actuators. Please help. I appreciate your assistance.