A coolant leak may develop from the water pump. The engine may overheat as a result of the coolant loss. A leaking water pump should be replaced.Google+
Car Problem Reports
Buick Rendezvous Leaking Water Pump May Cause Coolant Loss and Overheating
Buick Rendezvous Problem
Engine Affected: 3.4L V6
Average Mileage: 109,333 mi (74,000 mi - 165,000 mi)
I took my car to a Buick dealer three times for the overheating and they ended up putting in a new thermostat and still had problems now have coolant loss all over the driveway and have to take it back after over $550 for a thermostat I never needed in the first place
I have had numerous overheating problems and I have discovered that the water pump is leaking. It is not yet resolved.