Problems with 2007 Cadillac DTS SERVICE BRAKES, HYDRAULIC

After prolonged and continuous braking, car will pulsate or shake as if the brake discs are becoming warped. is obviously connected to heat buildup, as normal braking is not affected. *tr

Tl* the contact owns a 2007 cadillac dts. the contact stated that while driving 50 mph, the front end of the vehicle began to shake. the vehicle was taken to the dealer. the dealer replaced the brakes and the rotors, but the failure continued. the manufacturer was not contacted. the failure mileage was 20,000 and the current mileage was 106,000. the consumer stated ever since he drove the vehicle off the lot, there was an occasional shaking when driving downhill when he applied the brakes. it occurred consistently at certain parts of down grades, but it did not always occur in all down hill situations. the problem went away for a short time, when the dealer replaced the rotors, but when it did recur, it was even worse. updated 08/02/12

In traffic..truck in front of me, applied brakes and did not have any.,.stepped on gas and had no response..swerved to avoid crash..drifted into a parking lot and car came to a stop after several minutes started car and slowly drove home. as car unable to go more than 20 mph..not the first time..twice before...was driving and again no brakes...gas pedal not responsive...no warning lights on dash at any time. taken to dealer twice...they could not find anything wrong. i am afraid i will be killed or will kill someone because i can't control the car as i never know when this will happen. *tr

Following truck..stepped on brakes and did not have any...swerved to miss truck and stepped on gas and did not have any...drifted into parking lot and up an incline and drifted to a stop. has happened several times and nothing appeared on dash...and nothing can be found...someone will have to get killed before any thing is done about it. *tr

Bought car 2/7/2007. at 4000 miles ,had vibration, rotors were rusty and out of round, refinished rotors, then;a week later ,vibrated when apply brakes,lug nuts loose,tires out of bal.- dealer had lug nuts tightened and ,force bal.tires. at 5513 miles still a vibration;- dealer put on new tires, 6 months later made a noise, felt loose in front , took to dealer they removed and replaced r.axle brakes vibrating again 5 months later. called company took car to another dealer; turned rotors & rotated tires,still a vibration,replaced front rotors, 3months later had f.rotors refinished & remachined r. rotors less than 500 miles,vibration again so bad now steering wheel and front of car shakes. i am afraid to drive the car ,brakes may give away,could injure someone or a part may come off car. it doesn't feel safe to drive. i have read other reports on internet lots of people having vibration problems, may need a recall. waiting now to get in to get it fixed again. *tr