my brakes are real hard to push and when it stops it shakes real bad
brakes on 1992 Buick Park Avenue
A brake pedal that is real "hard" to push or requires excess brake pedal effort to slow down the car is usually a sign of a failed brake booster. Shaking as the car stops may be a booster problem if the booster is causing a vacuum leak in the engine or if the shake is from the brake system itself the brake rotors may be "out of true" and need to be turned or replaced. It could also be related to the rear brakes or worn suspension components. At any rate the brakes in your car are not working at there top efficiency and sound like they may even be dangerous and need to be looked at by a professional.
sound like u needs to replace your power booster.