The GMC Sierra Brake Booster allows drivers to bring their trucks to a halt by requiring much less pedal muscle. It multiplies foot force into increased hydraulic pressure at the master cylinder. A Brake Booster is located between the pedal and master cylinder, with a diaphragm and power piston contained within a two-piece case that is fed from engine vacuum or, in some versions, by pressurized steering fluid. The majority of the GMC Sierra lineup is based on the vacuum Brake Booster style. When the pedal is depressed, the actuator opens an internal valve, allowing atmospheric air into the rear chamber and allowing the manifold vacuum in the front chamber to pull the piston forward, pushing fluid towards the calipers. When the pedal is released, vacuum returns to both chambers so that the system is quickly reset. Certain heavy-duty trims have applied the hydraulic Brake Booster that takes pump pressure from the steering circuit or electric pump to provide constant boost even when the engine vacuum is low during towing or at high altitude. Both designs of Brake Booster have the same purpose but differ primarily in the power source, ensuring that GMC braking is confident for every driver of the Sierra.
Each OEM GMC Sierra Brake Booster we offer is competitively priced and comes with the assurance of the manufacturer's warranty for the part. Furthermore, we guarantee the speedy delivery of your orders right to your doorstep. Our hassle-free return policy is also in place for your peace of mind.