One problem related to brakes failed has been reported for the 1999 Buick Regal. The most recently reported issues are listed below.
My wife said the brakes felt "funny". But no red warning light showed. I went to drive the car to see what the problem was. When I started the engine and pushed the brake, the peddle went all the way to the floor and the brake fluid drained out in a puddle under the can - then the red warning light went on. Prior to this, there was no indication of a brake problem. If we had been driving, we would have had an accident. The car was towed to the dealer, who is now making repairs. I contacted gm to complain about the catastrophic nature of this brake failure -they will not accept any responsibility. I am concerned that this is likely to happen to other Buick owners will serious negative results.