SECTION 9-D 1957 BUICK POWER BRAKES 9-15 DESCRIPTION OF 1957 BUICK POWER BRAKE MECHANISM Wheel brake assemblies used in a 1957 Buick power brake system are identical with those used in a regular brake system. The 1957 Buick power brake unit provides lighter pedal pressures due to vacuum assist. These lighter pedal pressures are obtained [...]