Raybestos WC37784 is a PG Plus Professional Grade rear drum brake wheel cylinder that serves as a direct replacement for GM rear drum brake systems. Listings show WC37784 fits Chevrolet C1500, GMC K1500, and Chevrolet V20 Suburban models, and it appears in Raybestos’ Element3/PG Plus lineup as a rear wheel cylinder. Replacing a leaking wheel cylinder with WC37784 helps restore even rear-brake force and reliable drum-brake operation on eligible GM pickups and full-size SUVs.
