Most waterpumps fail because the impeller cracks and breaks apart. Stalling is not caused by the waterpump directly, but may be a symptom of an overheated engine. The waterpump failure is pretty common, especially after 60K miles. Dealer repair is around $300-450. Do it yourself for about $100. The squeaking/grinding, may be from the impeller getting lose on the shaft. If your waterpump is dead, the car will overheat and your blower will not blow hot air when the temp is turned to hot. Best not to drive an overheated engine.
