Maintain your Chevrolet, Buick, GMC, or Cadillac vehicle withGenuine GM Parts Clutch Slave Cylinder. This slave cylinder works in conjunction with the clutch master cylinder. When the vehicle's clutch pedal is depressed,rod connected to the clutch master cylinder forces hydraulic fluid throughline into the clutch slave cylinder. This hydraulic pressure activatesrod within the clutch slave cylinder against the clutch fork to optimize shifting of gears. Only Genuine GM Parts are tested to meet GM Original Equipment standards and are designed specifically to fit your vehicle.