Help your rear drum brakes apply smoothly with this Dorman drum brake wheel cylinder, part number W37854 from the First Stop line, which uses hydraulic pressure from the master cylinder to push the brake shoes out against the drum. It fits many vehicles, among them the 2003-2004 Chevrolet S10, 2003-2004 GMC Sonoma and 1990-2002 Chevrolet Astro, as a direct-fit replacement for the listed applications. See the Buyer's Guide tab for the full list and engine details.
- Direct match: Dorman engineered it to match the original wheel cylinder's fit, function and performance on the listed applications. It is manufactured and tested for quality assurance.
- Cost-effective service: Replacing the wheel cylinder while the drum brakes are apart is a quick, economical way to help maintain braking performance.
- EPDM rubber cups and boots: The pressure cups and boots are made from high-quality EPDM rubber.
- Surface-tested bores: Each cylinder bore is surface-tested to give the pressure cups an optimum sealing surface.
Signs a wheel cylinder may need replacing include brake fluid seeping from the cylinder or inside the drum, fluid-soaked brake shoes, a soft or sinking pedal, and uneven braking. Diagnose the cause before replacing parts. Replacing the wheel cylinders on both sides of the axle together is recommended for balanced braking. Bleed the brake system after installation, following the vehicle service information.
Interchange: 172-1484 · 784-44021 · 84-44021 · 101-1650 · W-86021 · 134.66021 · 135.66021 · 375-47074
1721484 · 78444021 · 8444021 · 1011650 · W86021 · 13466021 · 13566021 · 37547074 · 18E317 · W906650 · 34075 · WC14075 · 18015812 · 18060118 · 19213356 · WC37854 · F123199 · WC123199
This part cross-references / interchanges with the following part numbers:
172-1484, 18E317, 784-44021, 84-44021, W906650, 101-1650, W-86021, 34075, 134.66021, 135.66021, WC14075, 375-47074, 18015812, 18060118, 19213356, WC37854, F123199, WC123199
