The hydraulic pressure applied by the GMC Savana Wheel Cylinder is turned into shoe force, which clamps brake shoes firmly against the drum, providing the stopping power every van needs. The pistons in a Wheel Cylinder can be pushed away from each other by applying liquid pressure to the cylinder. When the driver presses the pedal, brake fluid enters the center port, which makes the pistons slide out and press the shoes against the drum. Upon release, the return springs pull everything back while the Wheel Cylinder spring holds the seals in their seat. Older GMC vans made use of heavier cast units, whereas modern Savana applications are constructed from corrosion-resistant aluminum. However, both designs share a similar simple plunger design and, in some rear drum applications, a split dual single piston Wheel Cylinder design. Moisture will cause pitting in the bore, and leaking at the seal can drop the pedal height or seize the pistons, so whenever the shoes are serviced, the drivers must check each Wheel Cylinder. If honing brings back a smooth surface, restore with new seals or simply replace the cylinder. If the clearance gets to be excessive, just replace the cylinder. The healthy condition of the GMC Savana drums relies on identifying leaks sooner rather than later and acting before the braking power fades.
Each OEM GMC Savana Wheel Cylinder 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.