Introduced in 2001, the Buick Rendezvous is a crossover SUV manufactured by General Motors. The Buick Rendezvous can develop a number of heating problems, which can often be resolved with some basic troubleshooting techniques.
The thermostat in the Buick Rendezvous can fail, preventing the release of coolant through the engine and resulting in lack of heat in the vehicle cabin or an overheated engine. Check the radiator hose while the engine is in operation. A warm radiator hose, which means it's filled with coolant, indicates that the Buick Rendezvous thermostat is failing to open and should be replaced.
The head gasket in the Buick Rendezvous can leak, drawing in air instead of properly releasing radiator fluid, resulting in air being trapped in the radiator and a subsequent overheating. Inspect the gasket seal for any cracks or leaks and replace the gasket as needed.
Excess coolant, or coolant overflow in the overflow tank can cause the radiator to draw in excess coolant during the cooling cycle, resulting in reduced heat transfer and less heat output in the Buick Rendezvous. Remove the excess coolant to restore proper heating.
