Car Stalls on 1991 Cadillac DeVille

My Cadillac stalls at stop signs when brake is applied, What would be the cause?

Asked by for the 1991 Cadillac DeVille
There are many things that can cause your engine to stall but a few things that come to mind are the following. A low idle condition caused by a dirty throttle body, faulty idle speed control motor, or a vacuum leak caused by the power brake unit.