Bring firm, dependable pedal response back to your classic Chevy or GMC hauler with the Dorman - First Stop Brake Master Cylinder (M39434). It's a direct-fit replacement for a wide range of 1977-1992 Chevrolet and GMC trucks and vans, including the CHEVROLET C10 SUBURBAN, C20, K20, G30 and P30, plus the GMC C1500 SUBURBAN, K2500, P2500 and P3500 — see the Buyer's Guide tab for the full list of applications and years.
The master cylinder sits at the heart of the hydraulic brake system, turning the force you apply at the pedal into fluid pressure that's sent to the brake circuits.
- Hydraulic pressure source: converts brake-pedal force into the fluid pressure that operates the vehicle's brakes.
- Direct-fit design: installs on the listed applications to replace a worn or leaking original unit.
- Serviceable wear item: if a failed master cylinder is the cause of a slowly sinking pedal or fluid loss, this replaces it.
Signs the original may need replacing include a pedal that gradually drops under steady foot pressure, a spongy feel, or fluid seepage at the cylinder. Diagnose the cause before replacing, since these symptoms can have other sources.
Interchange: 174-598 · 174598 · 18M229 · M900429 · 100-2583 · 1002583 · 13-2059 · 132059 · 10-2059 · 102059 · 130.66008 · 131.66008 · MC251930 · 18010746 · 18014707 · 2539434 · MC39434 · F101268 · F108148 · MC108148 · Manufacturer part number M39434.
This part cross-references / interchanges with the following part numbers:
174-598, 18M229, M900429, 100-2583, 13-2059, 10-2059, 130.66008, 131.66008, MC251930, 18010746, 18014707, 2539434, MC39434, F101268, F108148, MC108148
