Release Bearing
WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The release bearing is attached to the clutch actuator cylinder, which is attached to the front of the transmission. Movement of the clutch actuator cylinder piston moves the release bearing, to press against the tips of the diaphragm spring fingers. Ball bearings, in the release bearing, enable it to turn while applying pressure to the fingers. The release bearing is held in constant contact with the diaphragm spring fingers to prevent slippage and wear. This load is supplied by the clutch actuator spring.