Chevy C1500 Clutch Master and Slave Cylinder CC649028

This is a clutch hydraulic assembly for manual-transmission 1992-1995 Chevrolet and GMC C1500, C2500, C3500, K1500, K2500 and K3500 trucks. It includes the clutch master cylinder, the hydraulic line and the slave cylinder with its pushrod, connected as one assembly. It crosses to CC649028, 12385527, 12387711 and 10328CC.

On GMT400 trucks the master, line and slave were sold by GM as one assembly, and after thirty years the rubber in all three has aged together. A new master alone often just moves the leak to the slave a few months later, so the full assembly is the better repair when the pedal starts going soft.

Signs the clutch hydraulics are failing: the pedal sinks slowly to the floor or stays down, the pedal feels soft or spongy, the reservoir level keeps dropping, fluid is wet on the firewall or under the bellhousing, or it grinds going into gear because the clutch no longer releases all the way. If bleeding brings the pedal back for a day and then it goes soft again, a seal is leaking and the part needs replacing, not more bleeding.

GM ran different clutch hydraulics depending on transmission and engine in these years, so compare the new assembly with the old one before you install: master mounting, pedal pushrod end, slave mounting and line length. After install, check that the pedal is firm and returns fully and that the clutch releases cleanly with the engine running.