One problem related to coolant leaking has been reported for the 2003 Buick Rendezvous. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Buick Rendezvous based on all problems reported for the 2003 Rendezvous.
Water pump failure at 40,000 miles. Head gasket coolant leak at 45,000 miles. Replaced the water pump. Replacing the head gasket.